Which Types of Backlinks Actually Matter?
Not all backlinks are equal. A single editorial link from a respected regional newspaper can do more for your rankings than a hundred directory listings, yet a healthy profile still needs both. Understanding the different types of backlinks is the difference between building authority and simply collecting URLs.
Search engines such as Google and Bing treat a backlink as a vote of confidence from one website to another. Large language models behind ChatGPT, Gemini, Perplexity and Google's AI Overviews use similar signals, plus unlinked mentions, to decide which brands are credible enough to cite. That makes link type, context and source quality more important than raw link count.
This guide classifies every common backlink type, explains the link attributes that sit on top of them, and shows which to prioritise for traditional SEO, generative engine optimisation (GEO) and answer engine optimisation (AEO). If you are new to the topic, start with what link building is and why it matters, then come back here. Backlinks are also only one part of the bigger authority picture covered in our main guide to off-page SEO.
Key takeaways
- Backlinks are classified by how they were earned (editorial, PR, directory, community) and by their attribute (followed, nofollow, sponsored, UGC).
- Editorial links from relevant, trafficked sites remain the most valuable type for rankings.
- Nofollow and UGC links still carry value as hints and for AI search visibility.
- Directory and citation links are foundations, not growth drivers.
- Paid links without a sponsored attribute breach Google's spam policies.
- AI assistants reward repeated, consistent mentions across trusted sources, linked or not.
- A natural profile blends many link types rather than maximising one.
What is a backlink?
A backlink, also called an inbound link or incoming link, is a hyperlink on another website that points to a page on yours. When a crawler such as Googlebot or Bingbot follows it, it learns two things: that your page exists, and that the linking site considered it worth referencing. The clickable words, known as anchor text, add context about what the destination page covers.
Backlinks have been a core ranking input since PageRank, and they remain one of the strongest off-page signals. What has changed is how precisely search engines judge them. Modern systems evaluate topical relevance, the authority and trust of the linking domain, where the link sits on the page, the surrounding text, and whether the link looks editorially given or manufactured.
- Source domain — the website hosting the link.
- Referring page — the specific URL the link sits on.
- Anchor text — the visible, clickable words.
- Link attribute — rel values such as nofollow, sponsored or ugc.
- Target URL — the page on your site receiving the link.
What are the different backlink attributes?
Before looking at where links come from, it helps to understand the four attributes that tell search engines how to treat any link. These are set in the HTML rel attribute and apply across every type of backlink described later. Google now treats nofollow, sponsored and UGC as hints rather than strict directives, so they can still influence crawling and, sometimes, ranking.
Followed (dofollow) links
A followed link has no restrictive rel value. It passes link equity, sometimes called link juice, and is the type most people mean when they talk about backlinks for SEO. Editorial followed links from relevant publications remain the gold standard. However, a profile made entirely of followed links looks unnatural, because many platforms apply attributes by default.
Nofollow links
A nofollow link carries rel="nofollow", asking search engines not to pass endorsement. Large publishers, including many national news sites, apply it to most outbound links. Nofollow links still send referral traffic, build brand familiarity and contribute to AI search visibility, because language models read the text around them regardless of the attribute.
Sponsored links
The rel="sponsored" attribute marks paid placements, affiliate links, advertorials and gifted-product reviews. Google's spam policies require it on any link exchanged for money or value. Sponsored links are legitimate for exposure and traffic, but they should not be relied on to lift rankings, and hiding payment by leaving them followed risks a manual action.
UGC links
The rel="ugc" attribute identifies user-generated content: forum posts, blog comments, community answers and similar. Platforms such as Reddit and Quora apply it widely. UGC links are weak for traditional ranking, yet community discussions are heavily used as sources by AI assistants, so genuine participation can still pay off in answer engines.
| Attribute | Passes ranking value? | Typical source | Best use |
|---|---|---|---|
| Followed | Yes | Editorial articles, resources | Building authority |
| Nofollow | Hint only | Major news sites, social | Traffic and brand reach |
| Sponsored | Not intended | Advertorials, affiliates | Paid exposure |
| UGC | Hint only | Forums, comments, Q&A | Community and AI visibility |
The healthiest profiles contain all four. The distribution you should expect is explained in what makes a good link profile.
What are the main types of backlinks by source?
Attributes describe how a link is treated. Sources describe how it was earned, and that is what really determines value. The following types appear in almost every natural backlink profile, from a local tradesperson to a national B2B firm. They are listed roughly from highest to lowest typical value, though relevance to your sector can reorder them.
1. Editorial links
Editorial links are placed voluntarily by a writer or editor who found your content useful, for example a trade blog citing your research or an industry analyst referencing your guide. They are the purest endorsement because nobody asked or paid. You earn them by publishing linkable assets: original data, expert commentary, tools and definitive guides that other people need to reference.
2. Digital PR and press links
Digital PR links come from news outlets and online magazines covering a story, survey or expert comment you supplied. They are powerful because newspapers carry high trust and reach. Regional titles are often more achievable than nationals and add geographic relevance. The full playbook is in digital PR for UK businesses.
3. Guest contribution links
A guest post is an article you write for another site, usually with an author bio or contextual link back. Genuine contributions to respected industry publications build expertise signals and reach new audiences. Mass guest posting on low-quality, pay-to-publish blogs is a different thing entirely and is treated by Google as a link scheme, so be selective.
4. Resource page and citation links
Many organisations maintain resource pages listing useful tools, guides or suppliers. Universities, councils, charities and trade bodies publish these regularly. Earning a place means offering something genuinely helpful. Similarly, citation links occur when writers reference your statistics or definitions as a source — increasingly common as AI-assisted writers look for verifiable facts.
5. Business directory and local citation links
Directories such as Google Business Profile, Bing Places, Yell, Thomson Local and sector-specific listings provide citation links featuring your name, address and phone number (NAP). They carry modest ranking value individually but underpin local SEO and entity consistency. See link building for local SEO for which ones matter.
6. Association, partner and supplier links
Trade association member directories, chamber of commerce listings, accreditation bodies, suppliers and clients often link to businesses they work with. These links are highly relevant, hard for competitors to copy and strongly tied to real-world relationships — exactly the kind of signal search engines trust. Ask partners whether they have a "work with" or "stockists" page.
7. Community, forum and Q&A links
Links from Reddit threads, niche forums, Quora answers and community Slack or Discord archives usually carry UGC or nofollow attributes. Their ranking value is limited, but they generate referral traffic and are frequently surfaced by AI answer engines. Participate honestly and helpfully; drive-by link dropping is removed quickly and damages reputation.
8. Social profile and content links
Profiles on LinkedIn, YouTube, X, Instagram and Facebook link to your site and help search engines connect your brand entity across platforms. They are nearly always nofollow. Their main SEO role is entity reinforcement through sameAs schema and consistent branding, rather than passing authority directly.
9. Image, embed and infographic links
When other sites embed your chart, map, calculator or photograph with an attribution link, you gain a backlink tied to a visual asset. Reverse image searches often reveal unattributed use of your images, which can be converted into links with a polite request. This is one of the most overlooked and achievable backlink types.
10. Unlinked brand mentions
Strictly speaking, a mention without a hyperlink is not a backlink, but it belongs in this list because search engines and AI models increasingly treat it as a co-citation signal. Converting unlinked mentions into links is one of the easiest wins available. The wider debate is covered in are brand mentions more important than backlinks now?
| Type | Ranking value | Effort | AI search impact |
|---|---|---|---|
| Editorial | Very high | High | High |
| Digital PR / press | Very high | High | Very high |
| Guest contribution | Medium | Medium | Medium |
| Resource / citation | High | Medium | High |
| Directory / citation | Low | Low | Medium (entity) |
| Association / partner | High | Low | Medium |
| Community / Q&A | Low | Medium | High |
| Social profile | Low | Low | Medium (entity) |
| Image / embed | Medium | Low | Low |
Which types of backlinks should you avoid?
Some backlink types exist only to manipulate rankings. Google's link spam systems, including SpamBrain, are designed to neutralise them, and deliberate use can trigger a manual action. Even when they are simply ignored, you have wasted budget that could have funded genuine authority building.
- Private blog network (PBN) links built on expired domains.
- Paid followed links with no sponsored disclosure.
- Link farms and multi-topic "write for us" sites with no real readers.
- Automated comment, profile and forum-signature spam.
- Excessive reciprocal link swaps ("link to me and I'll link to you").
- Site-wide footer links from unrelated businesses.
- Exact-match commercial anchors bought in bulk.
If any of these sound familiar from a past agency, read link building mistakes and penalties before doing anything else.
How do backlink types affect AI search, GEO and AEO?
Generative engines such as ChatGPT search, Perplexity, Gemini and Google AI Overviews retrieve pages from a search index and then synthesise answers. Backlinks help in two ways: they lift your pages in the underlying index so they are more likely to be retrieved, and they place your brand name inside trusted sources that models learn from and quote.
This changes priorities slightly. Press coverage, industry roundups, comparison articles and community discussions punch above their traditional SEO weight, because those are the pages assistants cite when answering "who is the best…" or "what is…" questions. Consistent descriptions of what you do, repeated across sources, strengthen your entity so models describe you accurately.
- Prioritise links inside "best of" lists and expert roundups in your sector.
- Keep your brand description consistent in every bio and listing.
- Earn coverage on sites Bing ranks well, as Bing feeds several assistants.
- Treat nofollow press links as valuable, not second-class.
For the AI-specific evidence, see do backlinks help you rank in ChatGPT?
Which types of backlinks should you prioritise first?
For most UK small and medium businesses the order is practical rather than glamorous. Lay foundations you control, convert relationships you already have, then invest in assets and PR that earn editorial links over time. This sequence builds a natural profile and avoids spending on high-effort tactics before the basics are in place.
| Stage | Link types | Typical timeframe |
|---|---|---|
| 1. Foundations | Core directories, social profiles, Google Business Profile | Weeks 1–4 |
| 2. Relationships | Associations, suppliers, clients, local partners | Months 1–3 |
| 3. Reclamation | Unlinked mentions, image credits, broken links | Ongoing |
| 4. Assets | Guides, data, tools that earn resource and editorial links | Months 2–6 |
| 5. Coverage | Digital PR, expert comment, guest contributions | Months 3+ |
If you want a ready list of achievable wins for stage one and two, use 20 easy backlinks for UK businesses. The whole process is laid out in how to do off-page SEO step by step, and the other non-link activities are explained in the different types of off-page SEO.
Backlink glossary
- Anchor text — the clickable text of a link.
- Referring domain — a unique website linking to you.
- Link equity — the ranking value a followed link passes.
- Co-citation — being mentioned alongside related brands or topics.
- Contextual link — a link placed inside body copy.
- Link reclamation — recovering lost or unlinked mentions.
- Disavow — telling Google to ignore specific links.
- PBN — a private blog network built to sell links.
- NAP — name, address and phone number consistency.
- Entity — a distinct thing, such as a brand, that search engines understand.
Frequently asked questions
What is the most valuable type of backlink?+
An editorial, contextual link from a relevant website with real organic traffic. It is freely given, sits inside useful content and signals genuine endorsement to both search engines and AI assistants.
Are nofollow backlinks worthless?+
No. Google treats nofollow as a hint, they send referral traffic, and AI models read the surrounding text regardless of the attribute. A natural profile contains plenty of them.
Do directory backlinks still help SEO?+
Relevant, reputable directories help local SEO and entity consistency. Low-quality mass directories add nothing and can look manipulative, so stick to recognised and sector-specific listings.
Is it OK to pay for backlinks?+
Paying for exposure is fine if the link carries rel="sponsored". Paying for followed links to influence rankings breaches Google's spam policies and risks penalties.
How many types of backlinks should I have?+
There is no fixed number, but a healthy profile includes editorial, directory, partner, social and community links with a mix of attributes. Variety reflects a real business.
Are guest post backlinks safe?+
Genuine contributions to respected publications are safe. Mass guest posting on pay-to-publish sites with keyword-rich anchors is treated as a link scheme.
Which backlinks help with ChatGPT and AI Overviews?+
Press coverage, expert roundups, comparison articles and community discussions, because assistants frequently retrieve and cite those pages when answering questions.
Build a mix, not a pile
Understanding the different types of backlinks lets you invest where it counts. Foundations such as directories and social profiles make your business verifiable. Partner and association links prove real relationships. Editorial, resource and PR links build the authority that moves rankings and earns AI citations.
The goal is a profile that looks exactly like what it should be: the natural by-product of a useful, well-known business. Judge every opportunity on relevance, audience and editorial integrity, and treat attributes as context rather than a verdict.
If you would like your current backlinks audited and a link-earning plan built around your market, our SEO services cover it end to end, including GEO and AEO for AI search. Get in touch for a no-pressure review.
Related reading
What is link building?
The mechanics of backlinks, anchor text and link equity, plus how to start link building safely.
What is off-page SEO?
A full definition of off-page SEO beyond backlinks, and how each external signal is interpreted by Google and AI search.
What makes a good link profile?
How to evaluate backlinks on relevance, traffic and placement, with a scorecard and audit routine.
The different types of off-page SEO
Off-page SEO is far more than links. Here are the nine activity types, what each achieves and how to combine them.