Google's fourth spam update of 2026 took 13 days and 16 hours to roll out worldwide

The rollout began at 09:15 PDT on September 24 and ended at 01:00 PDT on October 8, according to a dev.to post that cites Google's Search Status Dashboard ^[4]. That is 13 days, 15 hours and 45 minutes, or 327.75 hours ^[19]. It finished 8.25 hours short of the two weeks Google says updates of this type can take ^[20][5].

Those two timestamps set the windows for the comparison. The audit the post describes is a before-and-after diff, run at the page level. I agree with it, and the steps run in order:

1. Pick a before window that closes before September 24 and an after window that opens after October 8 ^[4]. I would make the two windows the same length and start both on the same weekday, so weekly traffic cycles cancel out. 2. Export Search Console clicks, impressions, average position and indexed pages, then segment them ^[9]. Work per URL. A loss spread across the whole site is a different problem to investigate from one confined to a handful of URLs ^[10]. 3. Split branded queries from non-branded ones. That separates lost visibility from a change in how many people searched for the business name ^[11]. 4. Take the URLs that fell and compare them with pages that held, on purpose, content depth, template, internal linking and traffic source ^[13]. Then check the change log for publishing, migrations, redirects, canonical tags, robots directives and indexation changes that overlap the rollout dates ^[14].

Ranking trackers are the other data source, and the post handles them carefully. Industry trackers marked three main periods of ranking volatility during the rollout. The post calls them checkpoints, not proof that the update caused every movement on those dates ^[21]. It does not give the dates of the three windows.

A tracker's volatility reading is a benchmark taken on someone else's keyword set. For it to transfer to one site, two things would have to hold. That site's queries would have to resemble the tracked set. Nothing else would have to have changed in the same fortnight. Competitors, content edits, technical problems, seasonality and other Google systems all move rankings as well ^[22].

The post argues against sweeping edits while rankings are still settling, and says a measured audit is more useful than a rushed rewrite campaign ^[16]. It then closes by inviting readers to start an AI Visibility scan from GEO Search Leads ^[17].