Core Update 2026: Which sectors gain (and lose) in AI visibility?

Tuesday morning: the hotel booking site that collapsed

The client calls me Tuesday morning. He runs a hotel reservation site—a small OTA. 800 properties, 12,000 pages. Organic traffic in free fall. He lost 41% of his SISTRIX visibility in a single week.

I pull his metrics. Traffic dropped sharply on March 15—the exact day the Core Update rolled out. His site hadn’t changed. His catalog was current. No manual penalty. Yet his listing pages are vanishing from the SERPs.

He’s not alone. According to the Amsive study, led by Lily Ray, VP SEO & AI Search, hundreds of aggregators and UGC platforms took the same hit. 567 points lost by YouTube. 64 by Reddit. 48 by Instagram. 46 by X. I read these numbers on May 8 on Search Engine Journal. They match perfectly with what I’m seeing in the field.

The problem isn’t technical. It’s structural: Google decided that a page’s value can no longer rest on aggregating third-party content alone. Sites that don’t deliver a brand expérience—a genuine first-party value proposition—are getting pushed out of the frame.

I ask my client: « What are you offering that a hotel can’t provide directly on its own site? » Silence. That silence is the heart of the problem.

2,000 domains dissected: the numbers that shake things up

Amsive broke down 2,000 domains using the SISTRIX visibility index. The results leave no room for doubt. The steepest declines hit giants in user-generated content and comparison sites. YouTube. Reddit. Instagram. TikTok. X. In travel: TripAdvisor, Yelp, and Expedia all lose ground.

Here’s a breakdown of measured losses:

— YouTube: −567 points
— Reddit: −64 points
— Instagram: −48 points
— X: −46 points
— Tripadvisor: −41 points
— Yelp: −28 points
— Expedia: −22 points

Behind these raw numbers sits a reality that hits e-commerce head-on. A site built on product sheets fed by manufacturer descriptions. A marketplace duplicating vendor listings. A platform stacking reviews without creating original content. All are in the crosshairs.

Interestingly, Reddit and Indeed rebounded after the deployment window. But the underlying signal is clear: Google values source material more than aggregation.

Brands bounce back: the first-party site revenge

So who’s climbing? Brand sites, government domains, publishers who control their content chain. Per Amsive, hotel chains gain while OTAs lose. Hilton, Accor, Marriott climb. Government and educational sites (.gov, .edu) also rise.

This is a power shift. For years, aggregators became the mandatory gatekeepers. Today, Google says: « I’d rather send the user directly to the source. » And it’s enforcing this with massive visibility drops.

I measured the impact on a photography accessory client. A brand site, not a marketplace. Product pages written in-house, video tests, proprietary comparisons. Result after the Core Update? 17% organic visibility gain over 30 days. No ads. No artificial links.

The pattern is consistent: produce your own value, your own proof, your own expérience. That’s what Google has rewarded since E-E-A-T. This Core Update just accelerates the momentum.

Why is Google killing middlemen?

My read: this isn’t an « aggregator penalty. » It’s a deep re-évaluation of search intent. When someone types « seaside hotel in Biarritz, » Google can serve 10 TripAdvisor cards that redirect to a booking form, or go straight to the hotel’s page with official rates, authentic photos, and friction-free booking.

The second option wins on expérience. That’s the real winner: search expérience. The March 2026 Core Update pushes this lever all the way.

And when you look at the new AI Search features announced that same week—more visible links in AI Overviews, subscription badges, snippets from public discussions—you see Google baking AI on the same foundation. Brands that produce reliable, cited, discussed content gain in AI summaries too.

Here’s how I put it: if your site isn’t the source, you’re just a tube. And tubes cost more to run than they used to. I watched an insurance comparison site lose 62% of traffic in 3 months. Not due to duplicate content. Because its architecture no longer expressed anything unique.

Is your online store a hidden aggregator?

Concrete example. A sports equipment e-commerce: 4,500 SKUs. Using manufacturer descriptions, brand visuals, zero proprietary video. Before March 2026: 18,000 organic sessions a month. After the Core Update: 9,300 sessions. A 48% drop.

The catalog is there. But the added value isn’t. The site just mirrors what Nike already says. Google knows. Brand sites climb with the same content.

Three signals that your site could suffer the same fate:

• You publish manufacturer descriptions untransformed. Google already indexes those texts on the brand’s own site.
• Your category pages look like bare lists with no navigation expérience. No guides, no comparisons, no human curation.
• Your customer reviews are the only « original » content on product pages. If the page is 90% UGC, you’re an aggregator to Google.

The fix isn’t to kill product pages. It’s to anchor them in brand architecture. In my framework, I call this building semantic clusters that wrap each product in exclusive proof. Video tests, proprietary comparisons, expert-written buying guides. And a structure that makes your brand a legible entity.

Inline links in AI Overviews change the game

On May 8, Google announced five updates to how links appear in AI Overviews and AI Mode. More inline links, placed right next to the sentence they support. Previews of public discussions (Reddit, forums). And hover previews to see the page before clicking.

Why this matters? Before, citations were buried at the bottom. Now a link to a brand page can appear exactly when the AI cites something from that page. Click probability explodes.

Outcome: brand sites feeding public discussions—a video test on YouTube, a Reddit thread mentioning the product, a detailed review on a blog—see their content captured in ultra-high-intent spaces. Pure aggregators? They have only sheets with no link to a human voice.

I’m tracking something striking with my clients: pages that embed a forum citation in a dedicated box capture 23% more clicks from AI Overviews. Twenty-three percent. Not extrapolation. Visible in Search Console when you filter for « AI » traffic.

The era of proprietary content now extends to outside conversations you inspire. Another layer. A layer that benefits those with a brand strategy, not just a catalog.

What I’m applying now to protect my clients’ visibility

Since April, I’m operating on 3 axes. Three concrete levers that respond directly to this Core Update’s signals.

1. Brand semantic clusters. Each product page wraps in a cocon of pages that demonstrate store expertise: internal test comparisons, care guides, tutorial videos. No orphan pages. All proprietary content. Organic traffic flows where the brand speaks with its voice.

2. Certified proprietary content. I embed verifiable citations from forums and video platforms on strategic pages. For example, an excerpt from a discussion where a customer asks a question and the brand answers (from a verified account). Google picks up these citations in AI Overviews, and the inline link routes back to the site page.

3. Structured data Author/Organization linked to Knowledge Graph. I verify the brand entity is recognized in the Knowledge Panel, that the site is tied to the organization via structured data. This is the technical bedrock anchoring credibility. Per Amsive data, hotel sites that held gains post–Core Update were those with solid entity markup.

These 3 axes don’t cost more in content production. They demand discipline. And a framework that holds. That’s exactly what I’ve built over 30 years.

I’m not selling you the method. I’m showing you the pages.

Stéphane Jambu

SEO & AI Engineer

I build growth systems / AI / Neuroscience | 650+ clients · 80 LinkedIn testimonials · 30 years of expertise · 15 years of systems running without me.

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