Types of backlinks in SEO: which ones are worth building?

Types of backlinks in SEO: which ones are worth building?

The main types of backlinks are defined in two ways: the link attribute they carry, and the source that creates them. Attribute types include default/followed links, nofollow, sponsored and UGC. Source types include editorial links, guest posts, curated links and digital PR. They also include citations, resource pages, visual links, community links and risky tactics you should usually avoid.

That split matters because a backlink is not useful just because it exists. The strongest links tend to be editorial, relevant and crawlable. The weakest ones tend to be self-created, low quality or built mainly to influence rankings. You want the first group. The second group is where the mess lives.

Key takeaways

• Strong backlink types usually come from editorial choice: guest posts you earn, curated links, digital PR, resource pages, visual assets, testimonials and natural citations.
• Link attributes matter. Default/followed links, nofollow, sponsored and ugc all describe how a link is qualified, and Google may treat those qualifications as hints.
• Risky backlink types include paid dofollow links, link farms, PBNs, throwaway Web 2.0 links and spammy comment links. They are not clever shortcuts.
• The same channel can be safe or risky. A forum link in your useful answer is different from a mass-posted comment link with a stuffed anchor.

Understanding backlinks and their importance

Search engines use links to discover pages and assess how pages relate to each other. A relevant link from a trusted site can support your credibility because it points users, crawlers and context towards your content.

That does not mean every backlink improves rankings. Low quality link schemes, irrelevant placements and obvious manipulation can weaken a backlink profile. At best, those links add noise. At worst, they move you closer to Google's spam policies.

So the useful question is simple. Can you explain why the link belongs there? Would it make sense if rankings did not exist? If the answer is yes, you are usually closer to a backlink type worth building.

We will use that lens here. Each type below is framed by strength, likely attribute and risk, rather than treated as one more thing to add to a shopping list.

Link attributes: dofollow, nofollow, sponsored and UGC

The old shortcut was to split backlinks into dofollow and nofollow links. It is too thin now. A more useful taxonomy starts with link attributes: default/followed links, nofollow, sponsored and ugc.

SEO teams still say "dofollow", but there is no special dofollow tag. It usually means a normal link with no qualifying rel attribute. A default link may pass ranking signals when it is crawlable, editorial and relevant. It is not a magic authority pipe. Context still does most of the grown-up work.

We are starting with attributes because they affect how Google reads the link. They do not, by themselves, tell you whether the source is any good. A followed link from a weak page can be less useful than a nofollow link from a trusted publication. Traffic and trust still count.

rel="nofollow" tells Google that the publisher does not want to endorse the linked page in the usual way. Since Google's 2019 update, nofollow is treated as a hint. It is not a hard instruction to ignore the link entirely. A nofollow link can still help with referral traffic, brand visibility and discovery. It may not be the link you frame in the board deck. It can still have a job.

rel="sponsored" is the cleaner label for paid, affiliate or advertising links. If compensation changed hands, this is the attribute Google asks publishers to use. A sponsored tag does not automatically mean the placement is poor. It means the commercial relationship is being disclosed properly.

rel="ugc" is used for user-generated content, such as comments, forum posts and some community contributions. The attribute helps a site owner separate their own editorial links from links added by users. Again, Google may treat it as a hint.

If you want the deeper technical split, our guide to dofollow links and nofollow links covers the mechanics. For this page, the practical takeaway is simpler: do not judge a backlink type by attribute alone. Judge it by attribute, source, relevance, placement and risk.

A natural backlink profile can include a spread of attributes. There is no verified ratio to chase, and trying to manufacture one is exactly how sensible marketers end up doing odd things in spreadsheets. Which attribute a link carries often depends on where and how it was earned, which is what the rest of this guide covers.

High-quality backlinks: building the types that usually matter

The strongest backlink types are usually earned or placed inside relevant content where a real reader could click them. These categories are not equal, but they sit on the safer side of the line when the site, topic and placement make sense.

Curated links and niche edits

Curated Links, also known as niche edits or in-content links, place your link into an existing relevant article. They can be useful when the page already has topical context, indexation and authority. Quality depends on the host page and the surrounding copy. The link should read like a genuine recommendation, not a late-stage SEO transplant.

Check the page, not just the domain. You want a niche edit to sit in a paragraph that already supports the topic.

Guest blogging backlinks

Guest Posts, also known as guest blogging, are backlinks earned through an article published on another site in your market. They can support topical relevance and brand visibility. They can also send referral traffic when the host site has a real audience and the article deserves to be there. They are weak when the post exists only to carry an anchor.

The strongest guest posts answer a real query for the host site's readers. The link should feel like a citation inside the article, not the reason the article was written.

In practice, the split is simple. A guest-post placement is a 750+ word editorial article on a relevant third-party site, carrying one contextual dofollow link. A curated link, or niche edit, places the link into an existing relevant article instead of creating new copy. Rhino Rank offers both service types. Public pricing starts from $75 per guest-post placement and from $60 per curated link, which is a tidy way to see where the categories separate.

Visual backlinks

Visual Links are backlinks earned through images, graphics or visual assets published on a relevant site. The important bit is the link. An image backlink needs the image itself, its caption or a nearby citation to carry an actual hyperlink to a real URL.

Alt text does not create a backlink. It describes the image for accessibility and image search context. If an image is wrapped in an <a> tag pointing to your site, that linked image can count. If an article credits the image with a nearby text link, that link can count too.

Visual backlinks are not automatically equal in value to editorial text links. Their strength is that useful visuals can earn placements in already indexed content. They can also attract citations and give publishers a reason to reference your work. They work best when the asset explains something the page genuinely needs.

Editorial backlinks

When it comes to SEO, editorial backlinks are among the strongest backlink types because another publisher chooses to cite you. These links are typically formed when:

• Your website is listed as an information source.
• A person from your business is quoted by another person.
• Your website is featured in a round-up article.

To attract these links, you need content or expertise worth citing. That might be original data, a practical guide, a clear definition or a useful opinion from someone who works in the field. The point is not to sound important. It is to give the publisher a reason to trust the reference.

Natural backlinks

Natural backlinks, also known as organic backlinks, are links placed by real site owners without a direct placement request. They happen when someone finds your content, decides it helps their audience and links to it from their own page.

These are hard to force, which is mildly annoying and also the whole point. Natural links tend to come from useful assets. Think evergreen guides, data, tools, templates, case studies and clear explanations. You can promote those assets, but the link itself still needs editorial choice behind it.

You can make natural links more likely, though. Publish something specific enough to cite, then make sure the people who would cite it can actually find it.

Digital PR and press mentions

Digital PR backlinks come from coverage earned through journalists, publishers and industry media. The source might be original data, expert commentary, a reactive quote, a survey, a useful report or a genuinely newsworthy angle. This is different from a standard guest post because the publication is selecting the story, not simply hosting your contributed article.

These links can be strong when the publication is relevant, independent and read by the audience you care about. The catch is that not every press mention includes a live link. Some outlets cite a brand without linking. Others link with nofollow. That does not make the coverage useless. Brand visibility, referral traffic and unlinked mentions can still matter.

Digital PR overlaps with editorial backlinks. A press mention with a link is often an editorial backlink. The separate category is useful because the acquisition channel is different: you are pitching a story, not just requesting a placement.

Resource page links

Resource page links come from pages that curate helpful external resources on a topic. Think "recommended tools", "useful guides" or "industry resources" pages. A good resource-page link is earned because your page already fits the resource's stated criteria.

This can be a solid backlink type because the page exists to point readers towards useful external material. When the resource is maintained, relevant and selective, the link is closer to an editorial recommendation than a standard outreach link.

Quality varies heavily. Some resource pages are neglected or thin. Others are one step away from a link farm with nicer shoes. Check relevance, traffic signals and editorial standards. Also check whether the page is still maintained before you treat it as a target.

We would also check the company kept on the page. If every listed site is unrelated, the resource page is probably not as selective as the heading suggests.

Business and profile listings

Business and profile links, often called citations, appear on directories, Google Business Profile, industry associations and professional profile platforms. They usually reference your business name, address, phone number and website.

These links are moderate value rather than primary ranking fuel. They help most with local SEO, entity consistency and basic brand verification. Many are nofollow by default. That is fine. A legitimate profile on a relevant platform does not need to pretend it is an editorial article.

The line is relevance and legitimacy. A real trade body, local directory or professional platform is not the same as a low-quality directory created mainly to sell outbound links. The format is not the issue. The quality of the platform is.

For local businesses, citations also reduce confusion. If your name, address and phone number vary across the web, search engines and customers get a muddier signal. Clean listings will not replace strong editorial links. They help the base layer.

Press releases

Press release links come from brand-issued announcements distributed through wire services or a company's own newsroom. Historically, some teams used them as a link-building lever because one release could appear across many sites.

You should not value them that way now. Google's guidance treats promotional or self-serving links as needing qualification, so reputable distribution services commonly use nofollow or sponsored on press-release links. They rarely carry the same weight as independent editorial coverage.

Press releases can still help with visibility and brand mentions. They can also give journalists a clean source to cite. If a real publisher then writes their own story and links back editorially, that is the stronger backlink. The release itself is the starting point, not the prize.

Use them for news, not for link volume. A thin release sent to a wire service will not become a digital PR campaign just because it appears on many mirrored pages.

Video and podcast links

Video and podcast backlinks appear in YouTube descriptions, podcast show notes, guest bios and episode pages. The value usually comes from referral traffic, visibility and audience fit rather than raw link equity.

Platform matters. YouTube description links are commonly nofollow. Independently hosted show-notes pages vary by site. Assess the page like any other backlink source. A link from a relevant episode page on a respected industry site can be useful. A link buried in a thin description under a barely watched clip is mostly decoration.

These links are usually earned through real appearances, reviews, interviews or features. If the host's audience is a close match for your market, the link can do useful work even when the attribute is not followed.

We would judge these links by audience match first. A specialist podcast with modest reach can be more useful than a broad channel where nobody cares about the topic.

Social, community and Q&A links

Social, community and Q&A links come from places such as Reddit, Quora, industry forums and LinkedIn posts. They also appear in specialist communities. In the legitimate version, someone shares a link because it helps answer the question being discussed.

Most of these links are nofollow or UGC. Do not treat them as direct authority builders. Their value is referral traffic and visibility. They also help you learn what language your market uses when nobody is making them fill in a persona template.

The line between useful and spammy is intent. If you join a relevant discussion and link to a resource that genuinely helps, the link can make sense. If you paste the same URL across unrelated threads, you have simply invented more cleanup work for future you.

Use these links sparingly. Communities notice when your profile exists only to leave URLs, and moderators are rarely sentimental about that kind of thing.

Sponsored and UGC links in practice

Sponsored and UGC links are where the attribute taxonomy meets real acquisition sources. A sponsored backlink may come from affiliate content, a paid partnership or advertising. It can also come from a placement where compensation affected the link. It can still be legitimate when the relationship is disclosed and the link is qualified correctly.

UGC links come from content users add to a site: forum posts, comment sections, community profiles, wiki-style contributions and review platforms. The site owner tags them because they do not fully control every user submission.

Correct tagging is not a downside. It is what keeps the backlink profile honest with Google's spam policies while still allowing the link to send referral traffic and visibility. If the audience is right, that can be enough.

This is also why "nofollow" should not be treated as a dirty word. It can be the honest label for a useful link in the right place.

Creative link building techniques

Some backlink types sit between content strategy and outreach. They still need quality checks. They simply give you more ways to earn relevant links than asking for a guest post every Tuesday until everyone blocks your email.

We are still applying the same test. The tactic is only useful if the asset or pitch gives the publisher a reason to link.

Infographics and visual assets

For brand reach and link acquisition, building backlinks with images and visual assets can work well. Focus on presenting data or a process in a way that is easier to reference than rewrite. You can create charts, diagrams, graphics or short videos. Then promote those assets through relevant outreach, social posts and email. The link opportunity comes when another publisher uses or cites the asset.

The best visual assets usually save the writer time. If your chart explains the point clearly, citing it is easier than recreating it.

Broken link building

Broken link building is a tactic where you find a broken link on a relevant site. You then contact the site owner and suggest a useful replacement page from your own site. It can create relevant backlinks because you are helping fix a real issue.

Keep it as a category, not a whole campaign manual. The quality still depends on the target page. It also depends on the fit of your replacement content and the tone of the outreach. Tools such as Screaming Frog SEO Spider, Semrush and Ahrefs Site Explorer can help you find broken pages. Use them to review the backlink opportunity before you pitch.

Do not pitch any vaguely similar page. The replacement needs to solve the same problem for the reader, or the outreach will feel like admin work with an anchor attached.

Testimonials and reviews

Submitting testimonials to companies you have worked with or bought from can earn backlinks. The link appears when the company publishes your quote with a credit link. Testimonial link building works best when the endorsement is specific, useful and true. A thin "great service" quote with an exact-match anchor attached is unlikely to impress anyone, including the reader. You may also earn recognition links by giving genuinely helpful feedback on relevant review platforms.

This is usually a moderate tactic. It can add useful variety, but it should not carry the whole link plan.

Avoiding harmful backlinks

Not every backlink type belongs in your acquisition plan. Some categories are better understood as risk markers. That includes paid dofollow links, link farms, PBNs, legacy Web 2.0 links and comment spam. They can make a profile look manipulated, even if the short-term metrics look tempting.

Google's Search Essentials and spam policies focus on links built mainly to manipulate rankings. That means you need to judge the intent and execution, not just the label on the tactic.

If the method needs secrecy to work, that is usually your answer. A link you would be embarrassed to explain is rarely a long-term asset.

Paid links

Paid links are not automatically spam. Advertising, sponsorships and affiliate placements can be legitimate when they are disclosed and qualified with rel="sponsored" or rel="nofollow".

The risky version is buying links specifically to influence rankings while leaving them unqualified. Google's spam policies call out that version. If money changed hands and the link is trying to look editorial, you have a compliance problem, not a clever procurement strategy.

For SEO campaigns, safer defaults are still relevant editorial placements, curated links and guest blogging. In those cases, the content and site quality can carry the link.

Link farms and private blog networks (PBNs)

Link farms are collections of websites that exist mainly to link to each other or to paying sites. Private Blog Networks (PBNs) are similar. They are usually controlled by one owner or network and built to push links to external target sites.

These are legacy tactics to avoid, not backlink types to pursue. They are designed to simulate authority rather than earn it.

Google Search Essentials, including the spam policies, treat manipulative link schemes as a risk. Using link farms or PBNs to influence rankings can lead to ranking loss. It can also create manual-action risk or removal from search results. The metrics may look tidy in a tool, but the underlying pattern is still artificial.

Web 2.0 and self-created links

Web 2.0 links are self-created links placed on free publishing platforms such as Blogger, WordPress.com, Tumblr or similar sites. The legacy tactic is simple. Build thin pages mainly to host links back to your main site.

This belongs in the risky bucket. Legitimate use of those platforms, such as an active company publication with a real readership, is different. The risk comes from scale, thin content and intent: mass-creating throwaway properties purely to link out.

Spammy comment links

Spammy comment links come from irrelevant directories, fake forum profiles and low-quality comment sections. They also come from sites that accept almost any outbound link. This is not the same as useful community participation. It is the same channel used badly.

Search engines may treat these links as low quality. The risk rises when they use optimised anchor text or appear across unrelated pages. SEO tools such as Moz and Ahrefs can help you identify a website's spam score. A score is a signal, not a court verdict.

If you find bad links, start with assessment rather than panic. Many spammy links are ignored algorithmically. Google's disavow tool is an advanced, last-resort option. It is for sites with many spammy or artificial links, or a realistic manual-action risk. It is usually unnecessary for routine cleanup or one ugly referring domain.

We would not disavow a link just because one tool dislikes the domain. Look for pattern, intent and scale before you take action.

Reciprocal link exchanges

Swapping links with another site is normal when it happens occasionally between relevant pages. It becomes a problem when it turns into a scheme: "link to me and I'll link to you" arrangements at scale, or three-way swaps built only to pass ranking signals. Google lists excessive link exchanges among its link-spam examples. A handful of natural cross-links is fine. A spreadsheet of partners exists to be found.

Widget and footer links

Links baked into a widget, template, theme or site-wide footer and then distributed across many sites are a known pattern. One embeddable badge dropped onto hundreds of footers with the same keyword-rich anchor is the opposite of an editorial link. If you syndicate a widget or sponsor a template, keep any link nofollow or sponsored, or expect search engines to discount the lot.

Analysing and monitoring your backlink profile

To improve link building, you need to review the quality, relevance and spread of sites linking to you. A backlink profile is not just a count of referring domains. It includes attributes, anchors, page context, topical fit, risk signals and whether the links still exist.

Tools such as Ahrefs, Moz and Semrush can help you conduct a backlink audit. You can review referring domains, domain authority metrics, spam signals and anchor text. Use those tools to spot patterns. Watch for too many links from one network, too many exact-match anchors, too many irrelevant directories or a lack of editorial sources.

The goal is not to chase a perfect-looking chart. It is to understand which backlink types are actually supporting your site, which are harmless noise and which ones need attention.

Competitor analysis: learning from others' success

Analysing your competitors' backlinks can show which backlink types are common in your market. You may find publications that accept expert commentary. You may also find resource pages, podcasts or directories that genuinely matter in your niche.

Use competitor data as a map, not a photocopier. If a competitor has risky links, that is not proof you should copy them. It is proof you should understand what is working, what is noise and where a cleaner version of the opportunity exists.

Summary

The useful types of backlinks are not all chasing the same job. Attribute types tell you how a link is qualified. Source types tell you how it was earned or placed. Risk categories tell you what to avoid.

For most sites, the best backlink profile mixes editorial links, guest posts, curated links, digital PR, citations, resource pages, visual assets and selective community visibility. Paid dofollow links, PBNs, link farms, throwaway Web 2.0 pages and spam comments belong on the avoid list.

If the link would help a real reader on a real page, from a real site, it is usually worth a closer look.

Frequently asked questions

What is Google's stance on backlinks?

Google uses links to discover pages and understand relationships between pages. Genuine, relevant backlinks can support visibility, while links created mainly to manipulate rankings can fall under Google's spam policies.

The short version: Google rewards usefulness more than link labels, and it distrusts schemes built to fake popularity.

What are the main types of backlinks?

The main backlink attribute types are default/followed, nofollow, sponsored and ugc. A default link has no qualifying rel attribute and may pass ranking signals when it is crawlable and editorial. nofollow is used when a publisher does not want to endorse a link in the usual way. sponsored is used for paid or advertising links. ugc is used for user-generated content. Google may treat those attributes as hints, not rigid rules.

You can also group backlink types by source. Common source types include editorial links, guest posts, curated links and digital PR. Others include resource pages, citations, visual links, community links and risky self-created links.

What are the best backlinks?

The best backlinks are usually relevant, editorial and placed on pages that real users read. Editorial citations, quality guest posts, curated links, digital PR coverage and strong resource-page links often sit near the top of that list.

Weak backlinks tend to be irrelevant, automated or self-created at scale.

How can I acquire high quality backlinks?

You can acquire high quality backlinks by creating useful assets and pitching relevant publishers. Start with the pages your market already cites. Guest posts, digital PR, curated links, visual assets and specific testimonials can all help when they are genuinely useful.

How can I avoid harmful backlinks?

Avoid links built mainly to manipulate rankings. That includes paid dofollow links, link farms, PBNs, irrelevant directory links, throwaway Web 2.0 properties and spammy comment links. Focus on relevant sites, natural anchors and proper disclosure. Use sponsored, nofollow or ugc where the link needs qualification. Keep records. Google's Search Essentials are the useful line to keep in view.

What tools can I use to analyse and monitor my backlink profile?

Ahrefs, Moz and Semrush can all help you review referring domains, anchor text, link attributes, spam signals and competitor backlink profiles. Use them to find patterns. Review trends monthly. Compare changes over time, not one odd domain in isolation. Prioritise judgement, not panic over every strange link you see.

Are nofollow, sponsored and UGC links worth building?

Yes, when the source is relevant and the link has a real audience. They may not pass the same ranking weight as earned editorial followed links. Google treats these attributes as hints. They can still bring referral traffic, brand visibility and a more natural backlink profile. That makes them useful, not primary.

Every fact and commercial claim in this guide was fact checked and verified on 16 July 2026.