Of Google’s Seven 2026 Updates, Only September’s Spam Update Stands Out in the Data
Diib compared Google search traffic before and after each of Google's 2026 search updates. After six of them, about 1 in 100 websites lost half their search visits while other traffic held steady, the same as weeks with no update. During September's spam update, it was nearly 6 in 100.
For most websites in Diib's data, 2026's Google updates were background noise: the share of sites that lost half their search traffic was no higher than in a normal stretch. September's spam update was the exception, with sharp search-only drops more than four times as common as in weeks with no update, so a big drop since late September deserves a closer look.
Google released seven search updates in 2026 through early October: a Discover update in February, core updates in March and May, and spam updates in March, June, August and September. Diib looked at how each one lined up with Google search traffic across the websites in its data.
What Diib measured
For each update, we compared a site’s average daily visits from unpaid Google search in the 14 days before the update started with the 14 days after Google said it finished. The March spam and core updates overlapped, so they’re measured together. The September update didn’t finish until early October, so its “after” period covers the rollout itself (September 24–October 6). Each comparison included roughly 31,000–35,000 websites (about 30,000 in the baseline weeks) with connected Google Analytics and at least 10 search visits a day.
We counted sites that lost half or more of their search visits while visits from everywhere else held within 25% of normal. That filters out tracking problems and general traffic dips. As a baseline, we ran the same test on two stretches of summer weeks with no update.
| Update (start date) | Sites | Lost half of search visits, other traffic steady |
|---|---|---|
| February Discover update (Feb. 5) | 33,835 | 1.5% |
| March spam + core updates (Mar. 24 and 27) | 33,062 | 1.1% |
| May core update (May 21) | 32,081 | 1.2% |
| June spam update (June 24) | 30,925 | 1.0% |
| August spam update (Aug. 18) | 33,280 | 1.1% |
| September spam update (Sept. 24) | 34,597 | 5.8% |
| Weeks with no update (baseline) | 30,444–30,819 | 1.3% |
What this data can’t tell you
Six of the seven updates look like an ordinary couple of weeks in this data. That doesn’t mean they changed nothing: smaller ranking shifts wouldn’t show up in a test for halved traffic, and Google Analytics may not count all Discover visits as search. September is the clear exception, but timing alone can’t prove the update caused every drop, and the data can’t show which sites Google actually flagged for spam.
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