Google announced the August 2025 spam update on 26th Aug. It marked the update complete on the Search Status Dashboard on 22nd Sep 2025, after 26 days and 15 hours.
Google said the rollout "may take a few weeks to complete". At nearly four weeks it ran unusually long for a spam update.
It applied worldwide and to all languages. It turned out to be the only spam update of 2025; the previous one had shipped in December 2024.
Google announced nothing unique about the target. This was a general, broad improvement to its automated spam-detection systems.
The AI-based SpamBrain is the centerpiece of those systems, per Google's spam updates help page.
Search Engine Land reported the update touched down fast. Affected sites saw movement within roughly 24 hours of the start.
A second wave of ranking swings followed around 9th Sep.
Many hit sites saw steep drops in how often they showed up in results. Some sites hit by earlier spam updates recorded big recoveries.
Unlike a core update, a spam update leaves something specific to check. Google tells sites that see a change to review its spam policies and fix anything that falls short.
Google also cautions that improvements register only as its automated systems learn that a site complies. That learning takes months.
So recovery from a spam update is measured in months rather than days.
