Google
December 2025 Core Update
In brief
Last core update of 2025, rolled out through the end of December, closing out a year rich in major updates.
Key points
- Last core update of 2025, rolled out until the end of December.
- Closes a year rich in major updates.
- Year-end reshuffles across all topics.
- An annual quality review to factor into the 2026 strategy.
Analysis
A core update in the middle of the holiday period affects sites at the moment when their commercial traffic is often at its peak. The movements observed must be read in light of seasonality so as not to confuse an algorithmic effect with a calendar effect.
This last reassessment of the year is an opportunity to take stock of the underlying trends of 2025: constant emphasis on usefulness, the growing place of AI answers and heightened demands for reliability. These findings should feed the 2026 roadmap.
What to do
- Isolate the core update effect from seasonality by comparing to the same period the previous year.
- Draw up an annual review of winning and losing pages to prioritize the 2026 projects.
- Align the content strategy with the dual requirement of organic ranking and presence in AI answers.
Impact
Year-end reshuffling across all topics. An annual quality review to fold into the 2026 strategy.