Google core updates: what they are and what to do

This guide is built from Google Search Central: Google Search's core updates and your website, Debugging drops in Google Search traffic, A guide to Google Search ranking systems, and the Google Search Status Dashboard with its help page. Quotes are Google's; the dates are from the dashboard as of November 2026.

What Google means by helpful, people-first content, and its self-assessment questions, are in our helpful content guide. Practices that get a site demoted for spam are in our Google spam policies guide. This page is about the updates themselves: what they are, how to tell if one affected you, and what to do next.

What a core update is

Google describes core updates as "significant, broad changes to our search algorithms and systems" made "several times a year". They "don't target specific sites or individual web pages". The aim, in Google's words, is to keep "delivering on our mission to present helpful and reliable results for searchers" as the content on the web changes.

Google's own analogy is a list of your 20 favourite restaurants, written in 2019. New restaurants open, you reassess others, and the list changes. The ones that move down "aren't necessarily 'bad'; there are just other restaurants that make your top 20." A page that loses positions in a core update has not been penalised. Other pages are now judged more useful for that search.

Google also says that "most sites don't need to worry about core updates and may not even realize one has happened."

A few systems with familiar names now live inside the core ranking systems, according to Google's ranking systems guide: Panda (content quality) since 2015, Penguin (link spam) since 2016, and the helpful content system since March 2024. So a core update can reflect any of those signals. The same guide notes that ranking works mostly at page level, but "site-wide signals and classifiers are also used".

When they happen and how long they take

Google announces notable core updates on the Search Status Dashboard, which logs ranking updates and issues "that affect many sites or users". Each entry has a start date and a rollout length, and Google keeps them on the history page for five years. You can follow the dashboard by RSS. These are the core updates since 2024, as listed there (times are US Pacific):

Two things follow from the table. A rollout takes from about a week to several weeks, so rankings can move up and down during that time. And spam updates often run close to core updates (March 2024 and March 2026 had both), so check which update a date really lines up with. Spam updates are covered in our spam policies guide.

Not every core update is on the list. Google says it also makes "smaller core updates" that "are not announced because they aren't widely noticeable".

Checking whether one affected your site

Google's steps use the Search Console Performance report (our Performance report guide explains its filters and date comparisons):

1. Wait for the rollout to finish. Note the start and end dates on the dashboard.
2. Wait another week. Google recommends "waiting at least a full week after a core update completes before analyzing your site in Search Console".
3. Compare the right weeks. Compare the week after the update finished with a week before it started rolling out.
4. Review your top pages and queries. Look at how each ranked before and after, and whether the drop is small or large.
5. Look at each search type separately. Web, Images, Video and News can move differently.

For context, Google suggests setting the date range to the last 16 months, so a yearly dip does not look like an update.

Rule out the other causes first

A drop that happens during a core update is not always caused by it. Google's traffic drop guide lists the other usual suspects, and most can be checked in Search Console within minutes:

• Technical problems, such as server errors, robots.txt fetch failures or a misplaced noindex tag. Check the Crawl stats and Page indexing reports for a spike.
• Security issues such as malware or phishing, where Google may warn users before they reach the site. See our Security issues guide.
• Spam problems, including a manual action. See our manual actions guide.
• Seasonality or changing interest. Google suggests checking your biggest queries in Google Trends to see whether demand fell across the web or only for you.
• A site move or redesign. Changed URLs can cause fluctuations while Google recrawls; Google says a medium-sized site can take a few weeks. Our redesign SEO guide covers this.
• A reporting glitch. Google points to the Search Console data anomalies page for known logging and processing issues.

The shape of the drop also tells you something. If impressions held steady but clicks fell, Google's guide points to titles and snippets, or more appealing results from other sites, rather than a ranking loss.

Small drop or large drop

Google splits the response by how far a page fell. Its examples:

For a large, sustained drop, Google suggests three things: be objective about the whole site, ask people you trust "that are unaffiliated with your site" to assess it using the questions, and look closely at the pages that lost the most. In some cases, Google says, "there may be other pages on the web that are doing a better job of helping the searcher." Searching your lost queries and reading what now ranks above you is the quickest way to see that.

What to change, and what not to

Google's advice on making changes after a core update is short:

• No quick fixes. Google warns against "removing some page element because you heard it was bad for SEO". Make changes that make sense for users and last.
• Improve the content in real ways. Google's example is rewriting or restructuring a page so it is easier to read and navigate.
• Delete only as a last resort. Removing content is "only to be considered if you think the content can't be salvaged". If you find yourself thinking about deleting whole sections, Google says that is "likely a sign those sections were created for search engines first, and not people", and in that case removing the unhelpful content can help the rest of the site.

What "helpful" means in practice, page by page, is in our helpful content guide.

How long recovery takes

Google says some changes "can take effect in a few days, but it could take several months for our systems to learn and confirm that the site as a whole is now producing helpful, reliable, people-first content in the long term." If a few months pass with no effect, "that could mean waiting until the next core update." The smaller, unannounced core updates can also lift a site that has improved, so you do not always have to wait for the next big one.

Google is clear that there are no guarantees: "there's no guarantee that changes you make to your website will result in noticeable impact in search results". Its traffic drop guide adds that "if there's more deserving content, it will continue to rank well". Rankings are not fixed in place, and the web keeps changing.

How we handle a drop

This is our own routine for client sites, built on Google's steps above:

• Write down the update's start and end dates from the dashboard, and the date the drop began. If they do not line up, look elsewhere first.
• Go through the other causes in Search Console before touching any content.
• List the pages that lost the most clicks, and search their main queries to see what ranks now.
• Leave pages that only slipped a position or two alone.
• Rewrite the pages that fell hard for the reader: answer the question sooner, add what only you know (prices you can publish, real process, local detail), remove padding.
• Keep a dated log of every change, so the next comparison in Search Console means something.

FAQ

What is a Google core update?

A broad change to Google's search algorithms and systems, made several times a year. Core updates do not target specific sites or pages; they change how Google assesses content overall, so some pages move up and others move down.

How do I know when a core update is happening?

Google posts notable core updates on the Google Search Status Dashboard with the start date and, once finished, the rollout length. You can subscribe to its RSS feed. Smaller core updates are not announced.

How long does a core update take to roll out?

Recent core updates on the dashboard took between about 6 days (December 2024) and 45 days (March 2024). Google recommends waiting at least a full week after the rollout ends before analysing your site in Search Console.

Is a ranking drop after a core update a penalty?

No. Google says pages that drop are not necessarily bad; other content may now be judged more helpful. A manual action is a separate thing and shows in the Manual actions report in Search Console.

How long does it take to recover from a core update?

Google says some changes take effect in a few days, but it can take several months for its systems to confirm a site is producing helpful content in the long term, sometimes until the next core update. There is no guarantee of recovery.

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