Google releases core updates several times a year, and most of them come and go without causing too much disruption for well-maintained websites. The March 2026 core update was different. It began rolling out on 27 March and completed on 8 April, and by most measures it was one of the most significant algorithm changes in recent years. If your website traffic dipped in late March or early April and you’re not sure why, this is almost certainly what happened.
The scale of disruption was significant. Data analysed by SE Ranking and reported by Search Engine Land found that nearly 80% of URLs in the top three positions changed their rankings during the rollout, compared to 67% after the December 2025 update. Around one in four pages that had been ranking in the top ten dropped out of the top 100 entirely. The SEMrush Sensor, which tracks ranking volatility on a scale of one to ten, hit a peak score of 9.5, making this one of the most volatile updates recorded in recent years.
To put that in plain terms: across the web, the results page looked noticeably different after this update than before it. More than half of all monitored websites registered measurable ranking changes within the first two weeks. It’s also worth noting that the core update arrived just one day after the March 2026 spam update completed its own rollout. The two changes happening in such close succession made it harder to separate what caused what, though most analysts concluded the majority of the movement was driven by the core update, with the spam update adding further pressure on top.
The clearest finding from multiple independent analyses was that websites that exist to collect, summarise or route people towards information produced elsewhere tended to lose ground, while websites that are themselves the primary source of that information tended to gain.
The types of websites that gained visibility in the March update included government and institutional domains, specialist and niche publishers, established direct brands and official first-party sources. In travel, hotel chains gained while comparison platforms and aggregators like TripAdvisor and Expedia declined. In jobs, employer sites and specialist platforms like Amazon Jobs gained while broad job aggregators lost ground. In health, clinical and research-driven sources gained while broad consumer health sites declined. Government domains, including statistical and regulatory sources, saw strong gains on fact-based queries.
The types of websites that lost visibility were largely those built on an aggregation model: comparison websites, broad directories, job boards, content hubs that collect and repackage information from elsewhere, and sites where the content would be difficult to distinguish from dozens of similar pages covering the same topic.
Google has not published a detailed technical breakdown of what changed in March 2026. It described the update as a regular improvement to how it surfaces relevant and satisfying content, which is broadly how it describes all core updates. But the pattern of winners and losers suggests what it is increasingly rewarding.
The clearest signal is original value. Websites that publish information, research, products or expertise that you cannot find in substantially the same form elsewhere appear to have done well. Websites that exist primarily to aggregate or redirect are under more pressure. Google’s own guidance on creating helpful, people-first content puts it simply: if your page would not be missed if it disappeared from the web, that’s a problem.
Experience, expertise, authoritativeness and trustworthiness, the signals Google groups under the term E-E-A-T, also appear to have increased in weight. Analysis of the update’s winners found that pages demonstrating genuine first-hand experience, named authors with real credentials and original data or case studies tended to perform better than pages that read like a summary of what other sources say.
The shift towards primary sources is good news for businesses that are themselves the source of something. A local tradesperson, an independent retailer with their own products, a professional service firm with genuine expertise in their field: all of these are closer to what Google is rewarding. You are not an intermediary. You are the destination. The challenge is making sure your website reflects that clearly.
That means content that demonstrates what you know from experience, not just what you’ve looked up. It means pages that answer questions properly rather than listing information that could have been pulled from anywhere. And it means being clear about who you are, what you do and why someone would choose you, rather than producing content that could apply to any business of your type.
If your site did see a drop in traffic around late March or early April, the most useful first step is to check Google Search Console and identify which pages lost visibility and which queries they were associated with. Look at what replaced your pages in the results, and ask honestly whether those replacement pages are more directly useful, more authoritative or more clearly the primary source for the topic. That comparison will tell you more than any checklist.
A few practical things are worth checking regardless of whether you were affected:
If you noticed traffic changes in late March or early April and you’d like a second opinion on what might be behind them, we’re happy to take a look. Get in touch with the b:web team in Plymouth and we can review your Search Console data and talk through what it means for your site.
