Google confirmed that a broad core update began rolling out in early March 2026, just weeks after the company’s first-ever Discover-only core update finished in February. The timing caught many site owners off guard. Two significant algorithm changes within a month is unusual, even by Google’s standards.
Early data from multiple tracking tools suggests over 55% of monitored sites saw ranking changes within the first two weeks of the March update. Some of those shifts were substantial. Whether you saw traffic climb, drop, or hold steady, understanding what changed — and why — puts you in a better position to respond.
Here’s what happened, what these updates targeted, and what you should do about it.
What Happened — Two Updates in Quick Succession
February and March 2026 brought back-to-back algorithm changes, each with a different focus. To make sense of your site’s performance, you need to understand both.
On 5 February, Google began rolling out what it called a Discover core update — the first time the company had ever announced an update targeting Discover specifically. The rollout took 21 days to complete. Then, in early March, a broader core update started and finished in roughly two weeks. You can track the official status of both on the Google Search Status Dashboard.
The Discover Update
Google’s official blog post outlined three goals for the February Discover update: surface more locally relevant content, reduce clickbait, and prioritise original and in-depth reporting over rehashed material.
The results were measurable. The number of unique domains appearing in US Discover feeds dropped from 172 to 158, suggesting Google tightened the pool of sites it considers authoritative enough to feature. Sites that relied on sensational headlines or shallow aggregation of trending topics were the most affected.
For now, this Discover update applies to English-language content in the US only. Google has confirmed plans to expand it to other languages and regions later in 2026, so if you rely on Discover traffic in other markets, expect similar changes down the line.
What the March Core Update Targeted
The March broad core update touched several ranking signals simultaneously, which is typical of core updates. But a few areas stood out based on early analysis from the SEO community.
First, Google appears to have increased the weighting on Information Gain — a concept the company has patented and discussed in research papers. In practical terms, this means Google is evaluating how much genuinely new information your content adds compared to what already ranks. Pages that simply reword existing top results without contributing fresh data, perspectives, or analysis are losing ground.
Second, this is the first core update widely believed to use Google’s Gemini 4.0 Semantic Filter for identifying low-quality AI-generated content. This doesn’t penalise AI-assisted content outright. Instead, it targets pages where AI was used to produce content at scale without meaningful editorial oversight — the kind of output that reads fluently but says nothing that couldn’t be found in a dozen other articles.
Third, E-E-A-T requirements have tightened again, particularly for Your Money or Your Life (YMYL) topics such as health, finance, and legal advice. A study from Search Engine Journal found that 72% of top-ranking pages now display detailed author credentials, up from around 58% before the update. If you’re publishing in sensitive topic areas without clear authorship and demonstrated expertise, that’s a problem.
Winners and Losers
The pattern is consistent with what we saw in the December 2025 Core Update Explained — sites producing original work are being rewarded, while those cutting corners are losing visibility.
Winners from the March update tend to share common traits: original research, proprietary data, and expert commentary that can’t be found elsewhere. These sites saw an average visibility gain of around 22%, according to early tracking data. Industry-specific publications, niche blogs with first-hand experience, and sites that invest in their own studies or surveys performed particularly well.
On the losing side, the hardest-hit categories include AI-generated content published without editorial review, thin affiliate pages that exist primarily to funnel clicks, and coupon-only sites with little additional value. Several large content farms that had scaled production using AI tools saw double-digit percentage drops in organic visibility within the first week.
How to Check If You Were Affected
Before you make any changes, you need to know where you actually stand. Reacting to an update without data is guesswork.
Start in Google Analytics 4. Compare your organic traffic for the two weeks before the March update against the two weeks after. Look at both sessions and engaged sessions — sometimes overall traffic holds but engagement drops, which can signal that you’re ranking for different queries or attracting different visitors.
Next, open Google Search Console and check your impression and click trends. The Performance report will show you whether changes are happening at the query level, the page level, or both. This matters because core updates often affect individual pages rather than entire sites. You might find that your homepage is fine but a cluster of blog posts has dropped, or vice versa.
Don’t forget to check Discover traffic separately. In Search Console, navigate to Performance and then select the Discover tab. Given that the February Discover update and the March core update overlapped, your Discover traffic may tell a different story from your organic search traffic. Treat them as separate channels when diagnosing issues.
If your data shows no significant change, that’s good news — but still worth monitoring over the coming weeks. Core updates can continue to settle for up to a month after Google marks them as complete.
What to Do Now
Your response should depend entirely on what the data tells you. Here’s a practical breakdown for both scenarios.
If Your Traffic Dropped
Start by identifying which pages lost the most visibility. Then audit those pages honestly. Ask yourself whether each page exists to help someone or whether it exists primarily to rank. That distinction matters more than ever.
Look for common issues on affected pages:
- Thin content that restates what’s already available elsewhere without adding anything new
- Missing or vague author information, especially on YMYL topics
- Outdated facts, statistics, or recommendations that haven’t been reviewed recently
- AI-generated content that was published without thorough editorial review or the addition of genuine expertise
The fix isn’t to add more words. It’s to add more value. That means incorporating first-hand knowledge, original data, real-world examples, and expert commentary. If you ran a test, share the results. If you have client data (anonymised, of course), reference it. If you’ve done the work, show it.
For pages that were created purely as ranking plays — keyword-stuffed articles, thin comparison pages, or content you wouldn’t stand behind if someone asked you about it — either rewrite them substantially or consider removing them. A smaller site with consistently strong content will outperform a bloated site with a mix of quality levels.
If Your Traffic Is Stable or Improved
If your numbers held or went up, take that as confirmation that your approach is working. Original content and demonstrated expertise are being rewarded more than ever, so keep doing what got you here.
That said, there are still optimisations worth making. If you’re not already benefiting from Discover traffic, review your image setup. Pages with images at least 1200 pixels wide and the max-image-preview:large meta tag see up to 45% higher click-through rates in Discover. It’s a small technical change with a measurable payoff.
Consistency matters too. Sites that publish regularly within their niche tend to build Discover visibility over time. You don’t need to publish daily — but a steady cadence of quality content in your area of expertise signals to Google that your site is an active, reliable source.
Key Takeaways
These two updates reinforce a direction Google has been moving in for years, now with sharper tools to enforce it. Content that adds something genuinely new to the conversation is being rewarded. Content that rehashes, scrapes, or scales without editorial care is being demoted. If you’ve been creating helpful, honest content backed by real expertise, you’re on the right side of these changes. If not, the data will tell you where to start improving.
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