Google algorithm updates are changes to the systems Google uses to rank search results. Most are small and happen without notice, thousands of times a year. A few times a year Google releases a broader “core update”, which reassesses how well pages answer searches across the whole web, and it’s these that cause the sudden ranking drops site owners notice. You can’t stop an update affecting you, but you can tell quickly whether one did, avoid making things worse, and build a site that tends to gain from them.
This guide covers how to read a drop, what recovery really involves, and five strategies that protect you before the next update arrives.
What is a Google core update?
A core update is a significant, announced change to Google’s main ranking systems. It doesn’t target a specific trick or type of site. It changes how Google weighs signals of quality and relevance, so some pages rise and others fall, often across a whole sector.
Google says that a drop after a core update doesn’t mean a page did anything wrong. Other pages may simply now be judged a better answer. That’s why the response to a core update looks different from the response to a penalty, which we cover in our guide to recovering from a Google penalty.
How often does Google update its algorithm?
Constantly. Google makes thousands of changes to search every year, most too small to notice. Core updates come several times a year and are announced on the Google Search Status Dashboard, along with other named updates such as spam updates. A core update usually takes up to two weeks to roll out fully, and rankings can swing during that time before they settle.
How do I know if an algorithm update hit my site?
Compare the date your traffic changed with the dates of announced updates. Say you run a kitchen fitting company in Kingston and your enquiries from Google fall by a third in the space of a fortnight. Before deciding it was an update, work through this:
- Check the timing. Open the Performance report in Google Search Console and look for a clear change that lines up with an update’s rollout dates.
- Rule out your own changes. A site redesign, a new plugin, a broken analytics tag or a page accidentally set to “noindex” can all look like an update.
- Check for seasonality. Compare with the same weeks last year. Kitchen searches dip in December every year.
- Look at which pages and searches fell. Filter Search Console by page and by query. A drop across every page points to something sitewide. A drop on one group of pages, such as all your blog posts, tells you where to look.
- Check for a manual action. In Search Console, the Manual actions report tells you whether a person at Google has penalised the site. If it’s empty, you’re dealing with an algorithm change.
Wait until the rollout has finished before drawing conclusions. Positions often move back and forth for a week or two.
How do you recover from a Google algorithm update?
Recovery means improving the pages that lost ground until they’re the better answer again, then waiting. There’s rarely a single setting to fix. Google’s advice after core updates is to look honestly at your content: is it written by someone who knows the subject, does it answer the search fully, is it more useful than the pages now outranking it?
For the kitchen fitter, that might mean finding that the pages which fell are thin service pages with two paragraphs each, while the competitors now ranking show real projects, prices, timescales and photos. The fix is to make the pages genuinely better, then give Google time to reassess them. Improvements are sometimes recognised within weeks, but a full recovery often only shows at the next core update, months later.
What not to do: rewrite every page at once, delete large parts of the site in a panic, or buy links to make up the difference. Each makes the next diagnosis harder, and bought links carry their own risk.
After a core update, the question to ask is which pages now answer the search better than yours, and what they have that you don’t.
Five strategies to protect your site from algorithm updates
The sites that ride out updates well tend to share the same habits. None of them is a trick, which is why they keep working.
1. Keep up with announcements
Follow the Google Search Status Dashboard and the Google Search Central blog, and note update dates in your analytics or a shared calendar. When something moves, you’ll know within minutes whether an update is the likely cause.
2. Have a plan for diagnosing drops
Decide in advance who checks what, using the five steps above. A short, calm checklist stops the most common mistake, which is changing things before you know what happened. Look for patterns in the pages affected before you touch any of them.
3. Update content strategically
Google’s systems reward content that shows real experience and expertise and answers the search fully, a set of qualities its guidelines call E-E-A-T. Each quarter, review the pages that matter most to your business. Add the specifics only you can give: real examples, prices, process, photos, the questions customers actually ask. Remove or merge pages that are out of date or overlap.
4. Organise your site around topics
Grouping related pages together, sometimes called siloing or topic clusters, helps Google understand what each part of your site is about and helps visitors find the next page they need. For the kitchen fitter, that means a main kitchen fitting page linked to its supporting pages on worktops, layouts and costs, each linking back with descriptive anchor text.
5. Audit the site regularly
An SEO audit picks up problems before an update exposes them: slow pages, broken links, pages Google can’t index, duplicated content and poor mobile layouts. Page experience still matters, and Core Web Vitals measure loading speed, responsiveness and visual stability. An audit once or twice a year is cheap insurance.
How can agencies help businesses prepare for algorithm updates?
A good SEO agency watches for announced updates, compares your data against them as they roll out and tells you early whether you’ve been affected and why. Between updates, it keeps doing the work that makes a site resilient: technical audits, content improvements on the pages that drive enquiries, and steady authority building. The value is in the routine, because the sites that suffer most are usually the ones nobody looked at for a year.
How we approach algorithm updates
We monitor the sites we look after through every announced update and report what moved, which pages were affected and what we’d do about it, in plain English. Most of our work happens between updates, improving the pages that bring in enquiries so there’s less to fix when the next one arrives. You can read more about our SEO services, or see how this fits with on-page and off-page SEO.
FAQs
How often does Google update its algorithm?
Google changes its search systems thousands of times a year, mostly in small ways nobody notices. Broader core updates happen several times a year and are announced on the Google Search Status Dashboard. Each core update usually takes up to two weeks to roll out.
What is a Google core update?
A core update is a broad change to Google’s main ranking systems that reassesses how well pages answer searches. It doesn’t target specific sites or tricks, so a drop doesn’t necessarily mean your site did something wrong. It usually means other pages are now judged more helpful.
How long does it take to recover from a Google algorithm update?
Some improvements are recognised within weeks, but a full recovery from a core update often only shows at the next core update, which can be several months away. Recovery depends on genuinely improving the affected pages, so the sooner that work starts, the better.
Is an algorithm update the same as a Google penalty?
No. An algorithm update affects every site automatically, while a penalty, called a manual action, is applied by a person at Google when a site breaks its spam policies. Manual actions appear in Google Search Console with a reason, and you can ask Google to review them once the problem is fixed.
