If your traffic dropped after March 2026, you’re not alone. Google’s fastest core update in history rolled out in under 20 hours - and it hit harder than anyone expected.
The target? Thin content. Pages that exist but don’t add anything new. Articles that rehash what’s already ranking. Product descriptions copied from manufacturers. Blog posts that could have been written by anyone, about anything, with zero original insight.
Google calls the signal behind this update Information Gain. Understanding it is now essential for anyone who wants to rank.
What is Information Gain?
Information Gain is a ranking signal that measures how much new, useful information a page adds compared to other pages already ranking for the same query.
Think of it this way: if someone searches “best CRM for small business” and clicks through five results, each page should teach them something the previous four didn’t. If your page just repeats the same list of CRMs with the same generic pros and cons, you’re not providing information gain. You’re providing information repetition.
Google’s systems now actively detect and demote pages that fail this test.
The concept isn’t new. Google filed a patent on Information Gain scoring back in 2020. But the March 2026 update is the first time we’ve seen it applied at scale, with immediate and measurable impact on rankings.
How Google measures Information Gain
Google doesn’t publish exactly how Information Gain is calculated, but the patent and observable ranking changes point to several factors:
Unique entities and facts. Does your page mention people, companies, statistics, or concepts that other ranking pages don’t? If you’re writing about CRMs and you include a case study from a specific company with specific numbers, that’s information gain. If you’re just listing features that appear on the vendor’s own website, it’s not.
Original data. First-party research, surveys, internal data, or analysis that can’t be found elsewhere. This is the strongest signal. A page that says “47% of small businesses switch CRMs within 18 months, according to our survey of 500 founders” is providing something Google can’t find anywhere else.
Author expertise signals. Does the page show evidence of genuine expertise? Author bios, credentials, cited experience, named sources. Google is looking for reasons to trust that this content comes from someone who actually knows the subject - not someone who just Googled it and rewrote the top results.
Structural uniqueness. Comparison tables, decision frameworks, interactive tools, original diagrams. Content formats that synthesise information in ways other pages don’t.
Freshness with substance. Updated dates alone don’t count. Google can detect when a page was “updated” by changing a few words versus when genuinely new information was added. The March 2026 update specifically devalues superficial freshness updates.
What counts as thin content now
The definition of thin content has expanded. It’s no longer just about word count or obvious doorway pages. After March 2026, thin content includes:
Rehashed summaries. Articles that compile information from other sources without adding analysis, opinion, or new facts. Even well-written summaries now struggle to rank if they don’t offer something original.
Generic product descriptions. E-commerce pages using manufacturer copy, or slight rewrites of it. Google expects product pages to include original reviews, comparison context, or usage insights.
AI-generated filler. Content that reads fine but says nothing specific. The classic tell: you could swap in a different product, company, or topic and the text would still make sense. That’s a sign there’s no real information in it.
Outdated “evergreen” content. Pages that haven’t been meaningfully updated in years, especially in fast-moving fields. If your “complete guide to SEO” still talks about keyword density, Google sees it as low-value regardless of how well it once ranked.
Thin supporting pages. Category pages, tag pages, and hub pages with little content of their own. These used to rank on internal link authority alone. Now they need to provide standalone value.
Google March 2026 Checklist
Use this interactive checklist before publishing any page. Tick at least 8 of 12 items to pass.
How to check if your pages have Information Gain
The honest test: read your page, then read the top three results for the same keyword. Ask yourself - does my page teach the reader something those pages don’t?
If the answer is no, you have a thin content problem.
For a more systematic check, run your pages through Dablin’s SEO Audit. The audit includes an Information Gain check that flags pages lacking author signals, original data indicators, and structural differentiation. It also generates specific fixes for each issue found.
Look for these red flags:
- No author byline or bio
- No dates or timestamps
- No statistics, numbers, or specific claims
- No named sources or citations
- No original images, charts, or diagrams
- Word count under 600 for informational queries
- No internal links to related content
- Generic meta descriptions that could apply to any competitor
How to fix thin content
The fix isn’t to make pages longer. It’s to make them more useful. Here’s what actually works:
Add first-party data. Run a survey. Analyse your own customer data. Share metrics from your business. Even small datasets are valuable if they’re original. “We reviewed 100 product pages and found 73% were missing schema markup” is more valuable than a thousand words of generic advice.
Include specific examples. Name real companies, real tools, real people. Instead of “many businesses struggle with X,” say “when Acme Corp switched from Hubspot to Pipedrive, they reduced deal cycle time by 22%.” Specificity signals expertise.
Show your working. Explain how you reached your conclusions. Link to sources. Describe your methodology. This builds trust and demonstrates that your content is based on more than a quick Google search.
Add author credentials. Who wrote this, and why should anyone listen to them? A two-sentence bio with relevant experience is enough. Anonymous content is now a ranking liability.
Update with substance. When you refresh old content, add new sections, new data, new examples. Don’t just change the date and tweak a few sentences. Google can tell the difference.
Create original visuals. Charts, diagrams, screenshots, comparison tables. These are hard to fake and easy for Google to recognise as original contributions.
The pages that are winning now
Look at what’s ranking after March 2026 and you’ll see a pattern. The winners have:
- Clear author attribution with verifiable expertise
- Original research, data, or case studies
- Specific, named examples rather than generic advice
- Structured content that synthesises information in new ways
- Recent, substantive updates (not just date changes)
The losers are pages that could have been written by anyone. Content that exists to rank, not to inform.
What to do next
Start with an audit. Run your key pages through Dablin’s SEO Audit to identify Information Gain issues and get specific fixes.
Then prioritise. Focus on pages that rank positions 4-20 - these are close enough to benefit from improvements but vulnerable enough to drop further if you don’t act.
Finally, change how you create content. Before publishing anything new, ask: what does this page add that doesn’t exist elsewhere? If you can’t answer that question clearly, don’t publish until you can.
The March 2026 update isn’t going away. Information Gain is now a permanent part of how Google evaluates content. The sites that adapt will thrive. The ones that keep publishing thin content will keep losing ground.
The choice is yours.
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