If your organic traffic moved in the last two weeks, check the dates before you rewrite the site. On 24 September 2026 Google started rolling out its September 2026 spam update. It applies globally, and to all languages. Google said the rollout may take up to about two weeks, so into early October it is still rolling. As of early October, Google had not posted a completion notice.
Search Engine Journal reports it as the fourth confirmed spam update of 2026, after updates in March, June and August. Google has not named a specific new tactic. It is a notable improvement to automated spam detection.
What a spam update can change
Sites that breach Google's spam policies can rank lower, or drop out of results altogether, including generative surfaces such as AI answers that cite web pages. A site with a real policy problem can lose ordinary rankings and those citations together.
That outcome still comes from Google's spam systems. At Ven, SEO and GEO are separate services. SEO covers how you rank in normal search results and the organic traffic that brings. GEO, generative engine optimisation, covers how your business shows up in AI answers. An SEO plan does not include GEO. Watching this rollout is SEO monitoring.
What the weekend movement does and does not tell you
Early trade reports over the 25 to 27 September weekend noted elevated volatility in search results. Search Engine Roundtable described ranking movement building from 25 September through that weekend, with more of the two-week rollout still to come. That is observation from people watching ranking tools. It is not an official target list from Google, and it does not mean your site was singled out.
What to do
- If organic traffic wobbles, open Search Console and compare by date against 24 September. Look at queries and pages in the Performance report. One day's total is a weak signal while a rollout is still moving.
- Audit thin AI content, doorway pages, scraped material, and deceptive redirects against Google's spam policies. Pages that exist only to catch a search and send people elsewhere, or large sets of pages that say almost the same thing, are the kind of thing these systems are built to catch.
- Leave a clean site alone. Sites that already follow the spam policies usually need no campaign change. Wait for the rollout to settle before you rewrite strategy.
- If you do find a policy problem, fix that problem. A burst of new pages, published to force a recovery while the update is still moving, makes the picture harder to read.
If Ven looks after your SEO, we are already monitoring this. If you manage Search Console yourself, separate a real policy issue from normal week-to-week noise before you change course.
From Ven
Want SEO monitoring through the rollout?
Our SEO service watches Search Console and rankings through updates like this. GEO, the work on AI answers, stays a separate service.
The bottom line
The update started on 24 September and, as of early October, Google had not marked it complete. Check Search Console against that date, check the site against Google's spam policies, and give a clean site time to settle before you change the plan.
Related reading: Google Search Console for SEO and the monthly SEO checklist.
Also this week: the AI Max auto-upgrade for Search campaigns and Cloudflare's split between search and AI training.