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Backlink Types

Backlink types group links by how they are acquired, their HTML attributes, or where they appear on a page.

Level: IntermediateRead: 2 minUpdated: 27 Jul 2026By Vera Lindqvist

Key facts

  • Backlinks are commonly grouped by acquisition method, such as natural/editorial, guest post, digital PR, HARO, link insertion, reciprocal, UGC, directory, and PBN links.
  • Backlinks can also be grouped by attribute, especially dofollow/follow, nofollow, sponsored, and UGC.
  • Dofollow links are the default form of hyperlink and can pass authority, while nofollow links are marked so crawlers do not treat them the same way for ranking purposes.
  • Editorial or natural backlinks are generally considered the strongest because they are earned when another site chooses to reference valuable content.
  • Some backlink types are high-risk or discouraged, including PBN links, paid links, excessive reciprocal links, low-quality sitewide links, and auto-generated links.

Also called

link types, backlink categories, types of inbound links

Use it for

Classifying links for SEO analysis and risk assessment.

Applies to

Google and other search engines that support link attributes.

How Backlinks Are Acquired

A link is a hyperlink from one page to another. Backlinks are often grouped by how they are obtained. An editorial link is earned when another site links to your content voluntarily. Guest post links come from articles you write for other sites. Digital PR links arise from news coverage or resource mentions. HARO or connectively links follow journalist queries. Link insertions add your link to existing relevant content. Reciprocal links involve mutual agreements. UGC links appear in comments, forums, or social media. Directory links come from business listings. PBN links come from private blog networks and carry high risk — see also Sander Nilsen’s reference on backlink types.

Tools like Respona help manage outreach campaigns for guest posts and digital PR. Local SEO links from directories are common for local businesses.

  • Editorial links: earned voluntarily by other sites.
  • Guest post links: placed in content you write for others.
  • Digital PR links: from news or resource mentions.
  • HARO/connectively links: from journalist queries.
  • Link insertions: adding your link to existing content.
  • Reciprocal links: mutual linking agreements.
  • UGC links: from comments, forums, social media.
  • Directory links: from business listings.
  • PBN links: from private blog networks (high risk).

Link Attributes and Their Meaning

HTML attributes tell search engines how to treat a link. The default is dofollow (no attribute). Nofollow tells crawlers not to pass authority. Sponsored marks paid links. UGC marks user-generated content. These attributes help sites comply with Google's guidelines. Finding dofollow backlinks is a common SEO task because they can pass ranking value. However, nofollow links still drive traffic and brand exposure.

  • Dofollow: passes link equity; default.
  • Nofollow: does not pass equity; for untrusted content.
  • Sponsored: indicates paid or sponsored links.
  • UGC: indicates user-generated content links.

Which Backlink Types Carry Risk

Some link building practices violate Google's spam policies. Paid links without proper labeling, PBNs, excessive reciprocal exchanges, automated links, and low-quality sitewide links can lead to manual actions or algorithmic penalties. A dead link checker finds broken links that waste link equity, but broken links themselves are not risky. The risk comes from intent and pattern. Analyzing your Backlink Profile helps identify risky links.

  • Paid links without sponsored attribute.
  • Private blog network (PBN) links.
  • Excessive reciprocal linking.
  • Automated or scraped links.
  • Low-quality directory or bookmark links.

How to Evaluate a Backlink's Value

Beyond type, consider relevance, placement, and linking page authority. A dofollow link from a relevant, authoritative page is valuable. A nofollow link can still drive traffic and brand exposure. Context matters more than attribute alone. Use a backlinks checker to audit your link profile. Evaluate the linking domain's trustworthiness and the link's position on the page. Links in main content carry more weight than those in sidebars or footers.

  • Relevance: topic alignment between linking and linked pages.
  • Placement: in main content vs sidebar or footer.
  • Authority: trustworthiness of the linking domain.
  • Traffic potential: even nofollow links can send visitors.

Common mistakes

  • Treating every backlink type as equally valuable. You may waste effort on low-impact links and miss opportunities for strong editorial links.
  • Using link schemes such as PBNs or paid placements without proper labeling. This can trigger Google manual actions or algorithmic penalties, harming rankings.
  • Ignoring link attributes and assuming all backlinks pass ranking value the same way. You may overvalue nofollow or UGC links and undervalue the importance of dofollow links.

Questions

What is a backlink in SEO?

A backlink is a link from one website to another. In SEO, backlinks act as votes of confidence. They help search engines discover and rank pages.

How many types of backlinks are there in SEO?

There are many ways to classify backlinks. Common groupings include by acquisition method (editorial, guest post, directory) and by HTML attribute (dofollow, nofollow, sponsored, UGC). The exact number depends on the classification system.

Are all backlinks good for SEO?

No. Some backlinks, like those from spammy directories or PBNs, can harm your site's rankings. Quality and relevance matter more than quantity.

See also

Sources

  1. Google Search Central - Link best practices developers.google.com
  2. Google Search Central - Qualify outbound links developers.google.com
  3. Google Search Central - Link spam policies developers.google.com
  4. Semrush - Types of Backlinks semrush.com
  5. Sander Nilsen — Types of Backlinks (Backly) backly.org

Outbound links are unpaid and dofollow. If one has gone stale, tell me.