What is Link Spam?
Manipulative linking at scale: paid posts without disclosure, PBNs, injections, automated comments. Detection (SpamBrain and manual review) targets patterns, so one tactic’s death never saves the strategy.
Related terms
Toxic Backlink
A link from spammy, hacked, or manipulative neighborhoods that risks association harm. Audit the pattern (site-wide footers, PBNs, injections) before reaching for the disavow file.
Private Blog Network (PBN)
Sites controlled by one party purely to sell or pass links. Footprint detection (hosting, themes, ownership, link overlap) makes PBNs a recurring manual-action source.
Manual Action
A human reviewer penalty suppressing a site or pages until fixed and reconsidered. Check the Search Console report first whenever traffic collapses overnight without an update correlation.
Off-Page SEO
Everything that builds a site’s reputation elsewhere: backlinks, mentions, reviews, and digital PR. Off-page signals validate what on-page content claims about expertise.
Referring Domain
A unique site linking to you. Domain diversity matters more than raw link counts: 100 links from one site look like one relationship, not 100 votes.
Link Equity
The ranking value passed through a link, shaped by the source’s authority, relevance, and number of outbound links. Internal links distribute equity; external links earn it.