Google’s September 2026 Spam Update: What Diib’s Early Data Shows
Google began rolling out its fourth spam update of 2026 on September 24. In the first three days, about 1 in 10 websites in Diib's data saw their share of visits from Google search fall by half or more, double the rate over the same days a week earlier.
Most websites in Diib's data haven't seen a big search hit yet, but a larger-than-usual group has. Because the rollout could last until early October, a dip this week isn't final, and the sites to watch are the ones where search traffic keeps falling as the rollout continues.
What Google announced
On September 24, 2026, Google began rolling out its September 2026 spam update, which applies worldwide and in all languages. Google says the rollout may take up to two weeks. It’s the fourth spam update of 2026, after the March, June and August updates, each of which finished in under three days.
Spam updates adjust Google’s automated systems for spotting pages that break its spam policies, such as scraped content, hidden text or link schemes. Sites caught by them can rank lower or drop out of results.
What Diib’s early data shows
Traffic across the web dipped during the week the update started, including visits people make by typing a website address directly. To separate the update from that general dip, Diib looked at each site’s share of visits that came from unpaid Google search. It compared September 24–26 with the same days a week earlier, across 32,569 websites with connected Google Analytics.
- The median site’s share of visits from search slipped from 34% to 31%.
- 10% of sites saw their search share fall by half or more, compared with 5% over the same days the week before.
- After the August update (August 18–21), the median search share held steady: 32% in the two weeks before, 33% in the two weeks after, across 37,069 sites.
Three days into a rollout that could last two weeks, this is an early read, not a verdict. Some sites that dipped will recover, and some changes may not show up until the rollout finishes. The data also can’t show which sites Google actually flagged for spam.
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