December 18, 2025
By the Perfect Digital Solution team

Google’s December 2025 Core Update: What to Do and What Not to Do

Quick answer: Google began rolling out the December 2025 core update on December 11, 2025. While it rolls out, avoid making rushed changes. Once Google confirms it has finished, wait at least a week, compare your Search Console data with a week before the update and improve genuinely weak pages rather than chasing quick fixes.

This is Google’s third confirmed core update of 2025, after the March and June updates. Here is a clear list of what to do, and what not to do, if your rankings move during the December 2025 core update.

December 2025 core update key takeaways: what to do and avoid — Key takeaways: December 2025 core update: do and don’t

Table of Contents

What is the December 2025 core update?

It is a broad change to Google’s core ranking systems, announced on December 11, 2025. Core updates are designed to improve how Google assesses content overall. They are not penalties and do not target specific websites.

Earlier in 2025, the March core update ran from March 13 to March 27, and the June core update from June 30 to July 17. We explained that update in what Google’s June 2025 core update means for small business websites.

What should you do during the rollout?

Keep normal work going: publishing helpful content and fixing technical issues is fine.
Watch, do not react: rankings often move up and down several times before a rollout ends.
Check the Google Search Status Dashboard to see whether the update is still rolling out.
Note any major site changes you make, so you can separate their effect from the update.

December 2025 core update at a glance: the main steps covered in this guide — December 2025 core update: the key steps in this guide at a glance.

What should you avoid?

Rewriting or deleting pages in the middle of the rollout.
Buying links or using other tactics that break Google’s spam policies.
Assuming a third-party rank tracker shows the full picture.
Changing pages that still perform well because of small position drops.

Want a calm, data-led review of your rankings? We compare your Search Console data before and after the update and explain what, if anything, needs action. Get my free SEO audit.

How do you assess the impact once it finishes?

Wait until Google confirms the rollout is complete.
Wait at least one more full week.
In Search Console, compare that week with a week before December 11.
Review clicks, impressions and positions by page and query.
Decide whether changes are site-wide or limited to specific pages.

How do you improve after a large drop?

Google recommends reviewing affected pages against its helpful, reliable, people-first content questions. Ask whether each page fully answers the visitor’s question, shows real experience and expertise, is accurate and up to date, and would be trusted if found elsewhere.

Improve the most important pages first. Google says some improvements are reflected within days, but it can take several months for its systems to recognize them, and sometimes recovery shows only with a later core update.

How core updates connect to AI search

The qualities Google rewards in core updates, such as helpful, original and trustworthy content, are the same qualities that help pages appear in AI Overviews and AI Mode. Our guide to generative engine optimization explains how to build on that foundation.

For ongoing support, see our SEO services and AI search optimization service.

Sources

Written by the Perfect Digital Solution team. We use AI tools to support research and drafting, and every fact in this article is checked by our team against the sources listed above.