Google September 2026 spam update is complete
The fourth spam update of 2026 took almost two weeks to roll out. Google did not say what it targeted.
Google marked its September 2026 spam update as complete on October 8, 2026, 13 days and 16 hours after the rollout started on September 24.
What happened
That is much longer than the other spam updates this year. The March 2026 update finished in under a day, the June update in about two days, and the August update in about three. Google did not say what the September update targeted or why it took longer.
Spam updates improve automated systems such as SpamBrain. Unlike core updates, they are aimed at pages that break Google’s spam policies: scaled content abuse, site reputation abuse, expired domain abuse, cloaking and hidden text, among others.
What it means for you
- Drops after a spam update usually mean a policy issue, not a quality judgement. Recovery takes fixing the issue and waiting for the systems to re-evaluate, which can take months.
- Check for hidden text and injected content. Text that users can’t see but crawlers read is both a spam signal and a way to manipulate AI answers.
- Watch AI surfaces as well. Pages demoted for spam are unlikely to be cited in AI Overviews either.
Our Prompt Injection Scanner finds hidden instructions and invisible text on a page.