Quick answer: A Google core update is a broad change to the main ranking algorithm, not a penalty aimed at specific sites. Google confirmed one in March and has said that pages losing ground have not necessarily done anything wrong; other pages are now judged more relevant. If you were affected, check which pages and queries moved, compare your content with what now ranks, and improve quality and usefulness over time. There is usually no quick technical fix.
Every so often, rankings shift sharply across many industries at once. SEO forums fill up with screenshots of traffic drops and rank tracking tools show spikes in volatility. When Google confirms the change was a broad core update, the natural reaction is to look for the one thing that went wrong. That reaction often leads to rushed changes that make things worse.
This guide explains what core updates are, how they differ from other algorithm changes, and a practical way to respond.
What a core update is
Google changes its search algorithm constantly, often several times a day. Most changes are small and nobody notices. A few times a year, Google makes a larger change to its core ranking systems, which affect how it assesses relevance and quality across all kinds of searches.
In March, Google’s Search Liaison account confirmed a broad core algorithm update. The message was clear in tone: some sites will see drops or gains, there is nothing specifically wrong with pages that now perform less well, and the changes reward pages that were previously under-rewarded. Google also said there is no “fix” for pages that dropped, other than continuing to build great content.
That is different from targeted updates and actions:
- Manual actions are applied by Google’s reviewers for clear guideline violations, such as unnatural links or thin spammy content. You see them in Search Console and can file a reconsideration request.
- Targeted algorithms focus on specific issues: the mobile-friendly update, the HTTPS ranking signal, the interstitial penalty for intrusive mobile pop-ups, or the old Panda and Penguin updates (both now part of the core algorithm and running continuously).
- Broad core updates change how many signals are weighed together. They do not target a single tactic.
Why rankings move after a core update
Think of the search results for a query as a ranked list of the best answers Google can find. A core update changes how Google judges “best”. Your page might not have changed at all, but if Google now values different qualities, pages that better match those qualities move up and others move down.
Common patterns after core updates include:
- Relevance shifts. Google gets better at understanding what a query means, so pages that matched the words but not the intent can slip.
- Quality reassessment. Pages with thin, outdated or unhelpful content can lose ground to deeper, more accurate pages.
- Trust and expertise. Google’s Search Quality Rater Guidelines emphasise expertise, authoritativeness and trustworthiness, especially for topics that affect health, money or safety. Raters do not set rankings directly, but the guidelines show what Google is aiming for.
- Recovery for others. Sites that improved since the last update can finally be rewarded, pushing others down a place or two.
A drop from position 3 to 6 can mean a large traffic loss even though your page is still on page one. That is part of why core updates feel so dramatic.
Check whether you were really affected
Before changing anything, make sure the drop is real and connected to the update.
Rule out other causes
Traffic drops have many causes. Check these first:
- Tracking problems: a missing Google Analytics tag after a theme change, a filter misconfigured, or a broken cross-domain setup.
- Technical issues: accidental noindex tags, robots.txt blocking, a migration with missing redirects, or server errors.
- Seasonality: compare with the same period last year, not just last week.
- Manual actions or security issues reported in Search Console.
Our guide to diagnosing a website traffic drop walks through these checks step by step.
Match the timing
Compare your organic traffic and rankings against the confirmed date of the update. A drop that starts within a few days of the update, across Google organic traffic only (not Bing, not direct), points to the update. A drop that started two weeks earlier probably has another cause.
Find which pages and queries moved
In the Search Analytics report in Search Console, compare clicks and impressions for the weeks before and after the update. Filter by page to see which URLs lost the most, then by query to see which searches. Often the losses are concentrated in one section or one type of page, which tells you far more than the sitewide total.
What to do if you lost rankings
Do not panic or make sweeping changes
Deleting large sections of content, rewriting every title tag or disavowing hundreds of links in the first week rarely helps. Core updates take time to settle, and some movement reverses on its own.
Compare your pages with what now ranks
For the queries you lost, look at the pages that moved up. Ask honest questions:
- Do they answer the query more directly or completely?
- Are they more current or more accurate?
- Is the author or business clearly qualified to write about the topic?
- Is the page easier to use on mobile, with fewer ads or interruptions?
- Does the page match the type of result the searcher seems to want (a guide, a product list, a local business, a tool)?
The aim is not to copy competitors but to understand what Google now considers a better answer.
Improve quality where it counts
Improvements that tend to help over time:
- Update and expand content that is thin, outdated or written mainly for keywords.
- Merge overlapping pages that compete for the same query into one stronger page.
- Show who is behind the content: author bios, credentials, an About page with real details, contact information.
- Remove or improve low-value pages that add little, such as tag archives full of duplicate lists or auto-generated pages.
- Fix usability problems: intrusive pop-ups, aggressive ad placement, slow mobile pages.
A full SEO audit is a good way to find these issues systematically instead of guessing.
Keep the technical basics in order
Core updates are mainly about quality and relevance, but technical problems make everything harder. Make sure Google can crawl and index your important pages, your site works well on mobile (more relevant now that mobile-first indexing has started rolling out), and your site runs on HTTPS.
Be patient
Improvements may not be reflected until Google recrawls your pages and, in many cases, until a later core update. That can mean months rather than weeks. Track progress at the page and query level rather than watching daily totals.
What to do if you gained rankings
Gains can be just as temporary as losses if you treat them as luck. Look at which pages improved and why, protect them by keeping content current, and apply the same approach to weaker pages.
Building a site that holds up through updates
Sites that ride out core updates tend to share a few habits:
- They publish content for a clear audience and keep it accurate.
- They avoid shortcuts such as bought links, spun content or doorway pages.
- They review older content regularly and prune or improve what no longer helps.
- They watch Search Console and analytics closely enough to spot problems early.
- They treat SEO as part of running the business, not a one-off project.
FAQ
How often does Google release core updates?
Google says it releases broad core updates several times a year, while smaller changes happen daily. Not every core update is confirmed.
Is a core update a penalty?
No. A penalty (a manual action) appears in Search Console. A core update changes how all pages are assessed, so losing ground does not mean you broke a rule.
Can I recover in a few days?
Rarely. Recovery usually follows real improvements and a later reassessment, which often lines up with the next core update.
Should I disavow links after a drop?
Only if you have a clear problem with unnatural links, such as a manual action or a history of paid link schemes. A disavow file is not a general fix for core update losses.
Steady improvement beats quick fixes
Core updates are a reminder that rankings are relative. The most reliable response is to keep making your site the most useful answer for the people you want to reach. If you would like help working out what changed and where to focus, our search visibility service starts with exactly that kind of review.
