Google has officially started rolling out the December 2025 Core Update (December 11, 9:25 AM PT). It’s the third core update of 2025, after March and June, and the rollout can take up to three weeks. Google labels it as an “incident affecting ranking”, so volatility is expected. Reminder: core updates are broad reassessments of content quality across the web, drops don’t automatically mean something is “wrong.” Notably, just days before this update, Google clarified that rankings can improve outside major updates thanks to continuous smaller core changes. 👉 Expect fluctuations, track changes vs. the rollout timeline, and avoid knee-jerk fixes until the update fully completes.