LLM Best Practices

Link spam and disavow

3 min read

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Overview

Link building fails in a few predictable ways, and all of them sit inside Google’s link spam policy: buying links that pass ranking signal, engineering anchor text, and misusing the disavow tool. Penguin-era enforcement is now part of Google’s core spam systems (see algorithm-history), so the outcome is usually that the links get ignored, and in worse cases a manual action. This page sets the lines; the tactics that earn links cleanly are on Backlinks and link building.

Paid links that pass ranking signal violate Google’s link spam policies; detected links get ignored, and a pattern of them can bring a manual action. The rule is unconditional: any link bought for SEO purposes carries the same risk.

  • Sponsored content, paid product reviews, and influencer placements get rel="sponsored" or rel="nofollow".
  • Affiliate links get rel="sponsored".
  • User-generated content (comments, forum posts) gets rel="ugc".
  • Link insertions sold through outreach agencies are a high-risk category; the same agency sells to many sites, which makes the pattern easier to spot.

The policy covers selling links as well as buying them. Reject inbound link-buying offers and report the persistent ones.

Anchor-text mix matters more than any single link

Google’s link spam policy names links with optimized anchor text in articles or press releases as an example of link spam. A profile dominated by exact-match commercial anchors looks engineered; one led by branded, partial-match, and generic anchors looks natural. Google publishes no safe percentage; the guidance below is practitioner heuristic.

  • Track the anchor-text distribution across the inbound link profile.
  • When exact-match anchors start to dominate the profile, stop building them.
  • Branded anchors (“Example Corp,” “according to Example”) are the safest filler.
  • Generic anchors (“click here,” “this page”) are weak but neutral.

The disavow tool tells Google to ignore specific backlinks. Most sites should never use it. Google’s spam filters discount low-quality links on their own; a disavow file submitted preemptively can downweight links that were carrying positive signal.

  • Use disavow when Search Console shows a manual action for unnatural links, or when you know of many spammy or paid links pointing at the site that you cannot get removed. Google’s own guidance limits the tool to those cases.
  • Never disavow because a third-party SEO tool flagged links as “toxic.” Those tools have no access to Google’s actual scoring.
  • The disavow file is a plain text upload via the Disavow Tool; one domain or URL per line.
  • Once submitted, the file takes effect as Google recrawls the linking pages, which can take weeks. Google publishes no fixed timeline.

Common errors

  • Exact-match anchor stuffing. It matches Google’s link spam examples and risks the links being ignored or a manual action.
  • Preemptive disavow uploads. Drops links that were helping; removing entries from the file restores them only as Google recrawls.
  • Buying placements through “guest post” agencies. Same policy violation as a direct link buy.

Backlinks