Backlink Types

Backlink types are the different ways a link from one website to another is classified, such as by how it was earned, where it appears, or which HTML attribute it uses.

Also called: link types, backlink categories
Applies to: link building, SEO strategy, off-page optimisation

Key points

Backlink types classify links by acquisition method, attribute, or placement.
Editorial backlinks are generally the strongest type for SEO.
Nofollow, sponsored, and UGC attributes signal that a link should not pass authority.
The practical value of a backlink depends on relevance, placement, and linking page authority.
Avoid low-quality link types such as PBNs, excessive reciprocal links, or paid links without proper labeling.

How it works

Backlink types group hyperlinks by how they are obtained, where they appear, or the HTML attribute they carry. The main acquisition categories include editorial links (earned naturally), guest post links, digital PR links, HARO links, link insertions, reciprocal links, user-generated content (UGC) links, directory links, and links from private blog networks (PBNs). A typical backlink example of an editorial link is a mention from a high-authority news site citing your research. Each type carries different implications for trust and ranking impact.

By attribute, backlinks default to dofollow (or follow), which passes authority to the linked page. Nofollow links include a rel="nofollow" attribute telling crawlers not to treat the link for ranking purposes. Sponsored and UGC attributes were introduced to label paid placements and user-generated content respectively. These attributes do not prevent the link from driving traffic or discovery, but they influence how Google values the link for SEO.

Why it matters

Backlink type determines whether a link can pass authority, how risky it is, and how likely it is to help rankings or discovery. Prioritising earned editorial links over low-quality types builds a safer, more effective link profile. Ignoring link attributes or treating all backlinks as equal can lead to penalties or wasted effort. If a risky type like a PBN link is detected, a practitioner may need to disavow link using Google's Disavow Tool.

Common mistakes include using link schemes such as PBNs, paid placements without proper labelling, or excessive reciprocal exchanges. Overvaluing low-quality directory, comment, or social profile links may yield little SEO impact. Understanding types helps practitioners focus on high-value opportunities and avoid risky practices.

Where it changes your decision

When evaluating a potential link opportunity, the type (editorial vs paid vs directory) determines whether to pursue it; editorial links from relevant sites are almost always worth pursuing, while low-quality directory links may not.
When building backlinks, prioritising editorial links over automated or scheme-based types improves the profile's overall quality and resilience to algorithm updates.
When recovering from a manual action or algorithmic penalty, identifying and removing or disavowing risky types such as PBNs, paid links without sponsorship attribute, or excessive reciprocal links is a critical step.

What it is not

Belief: All backlinks are equally valuable. Correction: Editorial links from authoritative, relevant pages carry far more weight than low-quality directory or comment links, and the anchor text used also influences relevance.
Belief: Dofollow and nofollow links have the same SEO impact. Correction: Nofollow links do not pass authority, though they can still drive traffic and visibility.
Belief: Paid links are fine as long as they are not labelled. Correction: Google requires paid links to use the sponsored attribute; failing to do so violates guidelines.
Belief: Reciprocal links are always beneficial. Correction: Excessive reciprocal exchanges can be seen as link manipulation and may harm rankings.

Questions people ask

What is a backlink in SEO?

A backlink is a link from one webpage to another. In SEO, backlinks are used as signals of authority and relevance by search engines. They help pages rank higher when they come from trusted sources.

How to create backlinks?

Creating backlinks involves earning links from other websites through methods like producing high-quality content, guest posting, digital PR, or using HARO. Avoid link schemes such as PBNs or excessive exchanges.

Best backlinks for SEO?

The best backlinks for SEO are editorial, contextually placed links from authoritative and relevant websites. Dofollow links that appear naturally within content are typically most valuable.

Why are backlinks important?

Backlinks are important because they signal trust and authority to search engines, influencing rankings. They also drive referral traffic and discovery.

Sources

Google Search Central Primary source for Google’s link and spam policies, including how Google treats link attributes and manipulative link schemes.
Google Search Central - Link spam policies Best source for risky backlink types such as paid links, link exchanges, and other manipulative practices.
Google Search Central - Qualify outbound links Explains rel attributes like sponsored, nofollow, and UGC, which are central to backlink type classification.
Google Search Central - Link best practices Useful for editorial standards and safe acquisition patterns in link building.
Semrush Clear practitioner-friendly overview of common backlink categories and attributes.
Backly: Link types Taxonomy of link types with risk notes per pattern.

Written and maintained by Nora Lindholm. Last updated 27 July 2026.

Spotted an error? Email me — corrections are logged and credited on the entry. Outbound links are unpaid; most are nofollow.