Google's most recent confirmed core update is the December 2025 core update. It started rolling out on December 11, 2025, and Google marked it complete on December 29, 18 days later. Google had said it could take up to three weeks. It was the third core update of 2025, after ones in March and June.
The truth about core updates is less dramatic than the headlines around them. A core update is not a penalty and it does not target a specific trick. Google describes them as broad changes to how its systems assess content overall. Some pages rise, some fall, and most sites see some movement without anything being wrong.
That matters for what you do next. If traffic dropped, there is usually no single thing to fix and no manual action to appeal. Check Search Console for a manual action anyway, because that is a different problem with a real fix. If there is none, you are dealing with a relative change: other pages are now judged more useful for those queries than yours.
Do not judge the damage mid-rollout. Rankings move around while an update is rolling out, and this one ran through most of December. Compare a clean period after December 29 with a similar period before December 11, and remember holiday traffic distorts both.
Then look at which pages moved, not the site total. In Search Console, sort pages by the change in clicks. If the losses cluster on thin pages, affiliate roundups with nothing original, or articles written to rank rather than to answer, that is where to work. Google's own guidance for core updates keeps pointing to the same thing: content written for people, showing real knowledge, not content rebuilt around search engines.
Be patient about recovery. Improvements can take effect gradually, but a large recovery often shows up only around a later core update, because that is when the systems reassess broadly. Rewriting everything in a panic in the week after an update is more likely to hurt than help.
The short version: the December 2025 core update ran from December 11 to December 29. If you lost traffic, wait until the rollout was complete before comparing, find the specific pages that dropped, and improve them for readers. Then expect results over months, not days.
