The parasite-SEO crackdown: measured de-rankings after the March 2024 policy

The parasite-SEO crackdown: measured de-rankings after the March 2024 policy

The question: when Google's site-reputation-abuse policy targeted authority borrowed from a strong host domain, how much did affected sections actually fall?

Documented cases from the May 2024 manual-action wave: several major publishers hosting third-party 'coupon' and 'best-of' sections — content with no editorial connection to the host's expertise — saw those sections deindexed or lose an estimated 70-100% of their visibility almost overnight after manual actions and the policy's enforcement. Visibility trackers logged near-vertical drops on the affected subfolders while the publishers' core editorial content was untouched.

The policy codifies an EEAT principle: authority is topic- and creator-specific, not a domain-wide property a host can lend to unrelated content. The QRG has long warned raters not to let a strong domain rescue low-quality sub-content.

Counter-evidence: enforcement was manual and selective, so the drops reflect human action, not purely algorithmic reputation assessment — a different mechanism.

Caveat: 'parasite SEO worked, then was punished' tells us the loophole existed and was closed. It does not tell us reputation transfer never works, only that this flagrant form was targeted.

What we still don't know: where the algorithmic line sits for legitimate contributor content versus abusive borrowing — the policy describes intent, which is hard to operationalize.