Google Core Updates Explained: What They Are and How to Respond
Google releases several core updates a year, and each one can reshuffle rankings across the web. Here's what core updates are, how they differ from spam updates, and a calm, practical way to respond.
Key takeaways
- A core update is a broad change to Google's main ranking systems, released several times a year, usually taking up to two weeks to roll out.
- Core updates reassess quality and relevance across the web. A drop doesn't mean you broke a rule; it means other pages were judged more helpful.
- Spam updates are different: they target specific policy violations and need a different response.
- The right response is a content-quality review, not quick technical fixes, and patience: improvements are often recognised at the next core update.
Every few months Google announces a core update, and SEO forums light up with screenshots of traffic charts going up or down. Core updates are the single biggest source of ranking volatility for most websites, so it is worth understanding what they are and how to respond calmly.
What is a Google core update?
A core update is a significant, broad change to Google’s core ranking systems. Rather than targeting one type of page or one tactic, it changes how Google assesses relevance and quality across all search results. Google announces core updates on its Search Status Dashboard and they usually take up to two weeks to roll out fully.
Recent examples include the March 2024 core update (one of the largest ever, which also folded the helpful content system into core ranking), core updates in March, June and December 2025, and the March 2026 and May 2026 core updates.
Core updates vs other Google updates
| Update type | What it targets | Typical response |
|---|---|---|
| Core update | Overall relevance and quality across the web | Improve content quality and usefulness |
| Spam update | Violations of Google’s spam policies | Remove the violating content or practices |
| Reviews update (now part of core) | Quality of product and service reviews | Add first-hand testing and evidence |
| Helpful content (now part of core) | Content made mainly for search engines | Rewrite for people; remove search-first content |
| Discover core update | Content shown in the Discover feed | Improve originality and engagement for Discover |
Knowing which update hit you matters, because the fixes are different. A spam update needs you to stop a specific practice; a core update needs you to be more helpful than competing pages. See the September 2026 spam update for an example of the spam side.
Why rankings change in a core update
Google’s long-standing explanation is that core updates aren’t penalties. Think of a “best restaurants” list that gets refreshed: a restaurant that drops a few places hasn’t got worse; others were judged better, or diners’ needs changed.
In practice, pages tend to lose ground when:
- Competing pages answer the query more completely or more accurately
- Content is outdated, thin, or written to rank rather than to help
- The page lacks signs of first-hand experience and expertise (see E-E-A-T)
- Google’s understanding of the searcher’s intent changed, for example favouring forums, videos or product pages for a query that used to show articles
How to respond: a 6-step plan
1. Confirm it was the core update
Check that your drop lines up with the rollout dates. Rule out tracking problems, seasonality, site changes and manual actions in Search Console before blaming the update.
2. Wait until the rollout is complete
Rankings move around during a rollout. Wait at least a week after Google confirms completion before drawing conclusions.
3. Find exactly what dropped
In Search Console, compare clicks and impressions by page and by query before and after. Our guide to finding pages losing traffic in Search Console walks through it.
4. Study who replaced you
For your biggest lost queries, look at the pages that now rank. What do they do better? Are they newer, more specific, written by practitioners, or a different format entirely?
5. Improve the content, honestly
Ask the questions Google itself suggests: Does the content provide original information or analysis? Would you trust it? Is it written by someone who clearly knows the topic? Would a reader leave satisfied? Then rewrite, expand, merge or remove pages accordingly. The content audit guide gives you a framework.
6. Be patient and keep improving
Google says improvements can take time to be reflected, and many sites only see significant recovery when the next core update rolls out. Keep publishing genuinely useful content in the meantime.
What not to do
- Don’t make sweeping changes mid-rollout
- Don’t chase single “ranking factors” like word count or keyword density
- Don’t disavow links to fix a content-quality problem
- Don’t delete large parts of your site without analysing which pages actually earn traffic
Stay ahead of the next one
Core updates are a constant. Follow our Google SEO update history for the full timeline, run a regular SEO audit, and get each new update explained in the Weekly Marketing Pulse.