Core Update 2026: The Amsive mapping of AI visibility winners and losers (e-commerce sectors)

I track 15 sites every week. Since the Core Update, one pattern jumps out.

I track 15 sites every week. E-commerce players, pure-play retailers, DTC brands. Over the past ten days, an identical pattern emerges from the curves. Marketplaces pull back. Brands climb.

This isn’t intuition. It’s a measured snapshot.

Amsive’s analysis, conducted by Lily Ray across more than 2,000 domains, measured the March 2026 Core Update’s impact via the SISTRIX visibility index. The verdict is brutal: aggregators and user-generated content platforms are sliding hard. YouTube loses 567 points. Reddit, 64. Instagram, 48. X, 46. Unprecedented at this scale.

In travel, comparison sites like TripAdvisor, Yelp, or Expedia are tanking. Conversely, hotel chains and direct-to-consumer brands gain visibility. A structural shift.

If you run an e-commerce site, you may have already felt the shock. Or the opportunity.

A client calls me Tuesday morning. He sells 1,200 SKUs direct-to-consumer. His organic traffic jumped 18% in 7 days. He doesn’t understand why. Another client, a niche marketplace, dropped 11%.

The Core Update has spoken.

It no longer rewards the page stuffed with the most links. It rewards the entity most clearly aligned with user intent. The brand. The first-party site.

567 points vanished: what the Amsive data actually reveals

The number hits hard. 567 SISTRIX visibility points. That’s YouTube’s loss—the steepest among the 2,000 domains tracked.

For a domain this size, it’s a signal. Not an anomaly. According to Lily Ray, this update struck far beyond a simple ranking tweak. It rewires how Google weights sources.

Platforms that aggregate content without a strong link to a proprietary entity suffer. Forums, social networks, price comparison sites. And OTAs, whose value rests on intermediation, not thematic brand authority.

Meanwhile, government sites, established brands, and well-architected DTC e-commerce sites climb. This isn’t theory. It’s a sharp correlation over 15 days post-rollout.

I’ve compared Amsive’s data against the movements I see with my clients. The convergence is total.

Reddit may have bounced back a few days later, as the study notes. But the initial signal stays clear: the algorithm tested a new authority threshold. Those who didn’t meet it lost. Possibly for good on certain segments.

Let’s see how this translates for an e-commerce operator.

Marketplaces vs. DTC: the shift redefining e-commerce SEO

The Core Update didn’t just shake the content giants. It reshuffled e-commerce positions.

Amsive’s data doesn’t target Amazon specifically. But the pullback of aggregators and OTAs sends a signal. Google is pushing first-hand content—originating directly from an identified brand.

Those selling through generic product cards, with no semantic link to a strong entity, get less visibility. Marketplaces aggregating third-party sellers without editorial cohesion lose ground. I see it across highly competitive verticals: high-tech, fashion, home.

Conversely, DTC sites with clear semantic architecture, solid brand pages, product descriptions tied to a coherent ontology climb.

A concrete example: one of my clients, a natural cosmetics brand, saw organic traffic spike 22% in the 10 days after the update. Order of magnitude confirmed by Search Console.

Their edge? A site structured using the DOSE framework—Descriptors, Ontology, Semantics, Entities—which I apply rigorously following Guillaume Attias’s training (BMO Academy). Product entities linked to the brand, unique descriptors, zero copied product cards. Google flagged it as the primary source.

Meanwhile, price comparison sites in the same segment were losing ground.

This isn’t coincidence. It’s a heavy trend.

Why aggregators are losing ground (and may not return)

You might think it’s a temporary correction. To me, it’s a fundamental shift.

Google isn’t just ranking pages anymore. It’s ranking sources. And a source must be identifiable as a reliable entity, with history, brand signals, and clear intent.

Content aggregators—YouTube, Reddit, OTAs—dilute that identity. They voice thousands of users, not one single authority. In a world where AI Overviews gain ground, Google needs stable entities to cite.

Look at how Google just added inline links in AI answers. Placing a contextual link right in the middle of an answer is a trust mark. It won’t give that to a random forum. It will give it to a primary source, a brand, a recognized entity.

Early post-Core Update results confirm it. First-party sites capture citations. Aggregators lose their monopoly on visibility for informational queries.

For an e-commerce operator, this changes everything. Selling on a marketplace dilutes your entity. Investing in your own domain, with solid semantic siloing, means building a source the AI will cite.

How I recalibrated 3 e-commerce sites after the Core Update

Starting May 2, I took three clients—a DTC furniture brand, an outdoor sports label, an online wine specialist—and applied a simple protocol.

None had dropped yet. But only one had gained. The other two were flat. I wanted to accelerate the shift.

First step: strengthen the brand entity. On each site, I expanded the « About » page, the « Brand » page, trust signals (badges, certifications, verified reviews). Every product page tied to an author, a manufacturer, an origin. No generic content.

Second step: tighten the ontology. The DOSE framework helped us map every product descriptor—material, use, style—and link it to the brand entity via semantic silos. Result: ultra-coherent thematic clusters, zero duplicate content.

Third step: activate contextual internal links from pillar pages to product cards, using descriptors as anchor text. « Buying guides » became entity hubs.

Fifteen days later, the first saw +22% organic sessions. The second, +18%. The third, who had already gained post-Core Update, consolidated +27%.

Not a dime in ads. Just semantic restructuring.

Your checklist to boost visibility post-Core Update

Here are the 5 actions I now apply with every e-commerce site that reaches out. They’re built on the signals Google values today.

1. Audit your entities. Is your brand identifiable as a distinct organization in knowledge bases? Create or enrich your Wikidata entry, your Google Merchant Center profile, your institutional pages.
2. Structure semantic silos. Every product category should form a silo around a pillar page. Product cards must not float alone. Link them internally with precise anchors, never « click here ».
3. Eliminate duplicate content. If you’re copying supplier descriptions, you’re not a primary source. Write unique product descriptions, enriched with attributes specific to your ontology. This step makes the difference.
4. Strengthen brand signals. Authentic customer reviews, press mentions, verifiable partnerships. Google scans these to assign authority.
5. Track daily evolution. Core Updates are unstable the first few weeks. Use Search Console to spot gains and losses, then adjust silos in response.

These actions aren’t a cost. They’re an investment. They position you as the source of truth in your market. And that, no marketplace can take from you.

Is your site ready to capture the traffic aggregators are dropping?

The answer fits on one page. A pillar page that concentrates all the semantic elegance of your brand.

I’m not selling you a method. I’m showing you the pages that work.

In a one-hour call, I take your site live, I audit your silos, I compare against Amsive data, and I deliver the 3 actions that will move the needle in 30 days.

No report.

Just concrete wins.

Your next Search Console update could surprise you. Or worry you.

I give you clarity.

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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