ALGORITHM UPDATES · SEO GLOSSARY
Link Spam Update
A recurring Google algorithm update that identifies and neutralises unnatural, purchased, or otherwise manipulative links — reducing their PageRank contribution or triggering manual penalties.
Definition
Google\'s Link Spam Update (first major named rollout: July 2021) is an algorithmic signal designed to identify and neutralise backlinks that do not reflect genuine editorial judgment: paid links, link exchanges, links in low-quality guest post networks, UGC spam (forum comment and profile link schemes), and links from sites that exist primarily to sell links. When the algorithm identifies a link as likely spam, it nullifies it — the link ceases to pass PageRank. Google periodically rolls out named iterations of link spam algorithm improvements; each typically results in volatility in rankings for sites with heavily manipulative link profiles. Link spam updates interact with Google\'s SpamBrain AI and may overlap in effect with broad core algorithm updates.
Why it matters for SEO
Sites with link profiles built through link schemes are vulnerable to each Link Spam Update. After such an update, rankings may drop suddenly as previously credit-counted links are nullified. Recovery requires identifying and disavowing spam links via Google Search Console\'s Disavow Tool, or waiting for subsequent crawls to reassess the profile. Building only editorial links is the durable strategy; link schemes offer temporary gains that are progressively harder to sustain as link spam detection improves.
How DeepSEOAnalysis checks this
DeepSEOAnalysis audits link rel attribute usage on outgoing links (checking for undisclosed sponsored or paid links) and checks for link spam risk signals. Full backlink audit for spam link exposure requires Google Search Console\'s Links report combined with a third-party backlink tool.
GLOSSARY
Related terms
link building
Editorial Link
An inbound link earned naturally because another site chose to cite your content, without payment, request, or reciprocal arrangement.
Read definition →links
Disavow File
A disavow file is a plain-text file submitted to Google Search Console that tells Google to ignore specific backlinks when assessing a site\'s link profile. It is used to remove the negative signal from toxic or spammy backlinks that could trigger a manual penalty or algorithmic link spam devaluation.
Read definition →link building
Dofollow Link
A standard hyperlink without a nofollow, sponsored, or ugc attribute — one that passes PageRank and link equity to the destination page.
Read definition →offpage
Google Penguin
Google Penguin was an algorithm update launched in April 2012 that targeted manipulative link building practices — specifically sites with unnatural backlink profiles built through link schemes, paid links, keyword-stuffed anchor text, and private blog networks. Penguin became part of Google\'s real-time core ranking algorithm in September 2016 (Penguin 4.0). It now runs continuously rather than in periodic refreshes.
Read definition →algorithm updates
Helpful Content System
A Google ranking system (launched 2022) that classifies and downgrades content created primarily to rank in search rather than to genuinely help people — with site-wide effects.
Read definition →See how your site scores on Link Spam Update.
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