Google is simultaneously running two experiments that further blur the boundary between paid and organic content in search results. An AI label has been spotted attached to some search ads on mobile, with no additional information provided when tapped. Separately, sponsored ads have now been observed appearing inside the "related products" grid section on the standard search results page - a surface that, until recently, showed only organic listings. Both developments were documented in late April 2026 and add fresh detail to how paid inventory is being introduced into parts of the search results page that advertisers and users had not previously associated with direct auction-based placement.

The AI label experiment

On April 27, 2026, Search Engine Roundtable reported that Google is testing an AI label on some of its search ads - the sponsored results that appear at the top of the search results page. According to Brodie Clark, the SEO and SERP researcher who spotted the label, clicking on it does nothing. No tooltip appears, no additional information is surfaced, and no explanation of what the label means is provided to the user.

Clark documented two variations. According to him, "Google is testing out a new AI label attached to some ads on mobile. No additional information is provided after clicking on the AI label." He further described the two formats observed: "There are two variations of this experiment so far, one with the AI label having a rounded background and the other with an information icon beside the AI text."

The label is visible on mobile search. In one variant, the "AI" text appears with a rounded pill-shaped background attached directly to the ad. In the other, an information icon sits next to the AI designation. Screenshots shared by Clark on X and via SERP Alerts show this appearing in a standard sponsored results block for pet insurance queries in Australia, where several ads are grouped under a single header.

What the label is meant to signal is not clear. Google has not announced the test or explained its purpose. It could indicate that the ad creative, the targeting, or the bidding was assisted or generated by AI tools. It could also relate to Google's broader use of AI to construct responsive search ad assets or to optimize Performance Max campaigns. None of those interpretations have been confirmed. The label currently communicates something undefined to users who tap on it and receive no response.

This is notable given the trajectory of Google's ad labeling practices over the past twelve months. Google introduced a sticky "Sponsored results" header in October 2025, replacing individual ad designations with a single persistent label that remains visible as users scroll. That same announcement included a control allowing users to collapse the sponsored block entirely. In July 2025, Google removed the prominent "Sponsored" label from its "Find Related Products & Services" ad units, replacing it with a smaller disclaimer text positioned below the unit. These moves were interpreted differently by industry observers - one adding prominence to commercial labeling, the other reducing it.

The AI label test does not neatly fit either pattern. Adding a new label to an existing ad type could increase transparency if the label communicates something useful. With no click-through information and no public explanation from Google, it functions instead as a visual marker without a defined meaning. Whether it expands into a fuller disclosure mechanism or disappears as an experiment remains to be seen.

The second development was documented on April 22, 2026, by the SERP Alert newsletter account on X, which monitors SERP feature changes and is powered by Brodie Clark's research infrastructure. The post asked, "So now ads are also appearing in product grid units within the 'related products' section? Ads now at the top and now ads at the bottom... got it." The post accumulated 361 views and drew attention in the search marketing community because it identifies a further extension of sponsored placements within the standard search results page.

The related products section appears on the right side or lower portion of the desktop search results page for shopping-related queries. An uploaded screenshot accompanying the SERP Alert post shows a search for "bed sheets for king beds." On the left side of the split view, an SEO tool called SERP Lens displays organic results for related queries. On the right, the Google results page shows a standard layout including a "Popular products" carousel at the top and, further down, a "Related products" section labeled "Sponsored" - containing product tiles with pricing and retailer information for items like a temperature-regulating bamboo sheet set priced at $134.00 from a retailer called Quince.

The screenshot captures both the Sponsored label on the related products section and the product tile-level detail, including star ratings, price points, and retailer names. Several products in the visible panel are from Quince and one from a brand labeled "510." The visual confirms that the related products section now carries paid inventory, positioned below the standard ad block at the top of the page and below the main organic results.

This means paid content has now expanded to cover more vertical real estate within a single query results page. The top of the page shows a sponsored results block. The middle of the page contains organic links and AI Overviews for eligible queries. The product-focused sections below - both the popular products carousel and the related products grid - now carry sponsored tiles. Users interacting with shopping-intent queries may encounter multiple distinct ad surfaces at different scroll depths on a single page.

Three surfaces, one pattern

PPC Land documented in late April 2026 that Google extended sponsored ads to the free listing grid in the Shopping tab, following their earlier introduction into AI Mode grids and the main search results page grid. The related products observation from SERP Alert adds a fourth surface to this sequence: the product grid within standard search results that appears as a discovery panel for adjacent products, not just in the dedicated Shopping tab.

The sequence runs as follows. Ads first appeared in grid format within AI Mode product panels, as documented when sponsored stores units were spotted inside AI Mode in March 2026. According to Clark's timeline documentation, on April 2, 2026, he first observed ads appearing within the main search results section in grid format, with between one and four sponsored tiles in a single grid. On April 20, 2026, the Shopping tab's free listing grid received the same treatment. The SERP Alert post of April 22, 2026 then flags the related products section as an additional surface where sponsored placements are appearing.

Each surface represents a different context within the same user journey. The Shopping tab grid is accessed by users who have actively navigated to the dedicated shopping surface. The main search results grid appears as part of the default results for product-intent queries. The related products panel serves a discovery function - surfacing items adjacent to whatever the user was searching for, rather than direct results for that query. Inserting paid inventory at the discovery layer means that even exploratory browsing within the organic search experience can now deliver auction-based product tiles.

How ad labeling works at the tile level

In the related products section visible in the April 22 screenshot, the "Sponsored" label appears at the section header level. The individual product tiles in the captured example appear without individual tile-level "Sponsored" markers. This contrasts slightly with the approach used in the Shopping tab and AI Mode, where the labeling mechanism is per-tile, with individual sponsored products carrying their own "Sponsored" designation rather than a section-level label. Whether the labeling approach will standardize across surfaces over time, or whether the related products section retains section-level labeling, has not been confirmed by Google.

The distinction matters for user comprehension. A section-level label requires users to maintain context as they scan individual tiles below it. A tile-level label provides the designation directly on each paid product, leaving no ambiguity about which specific items are sponsored. The October 2025 sticky "Sponsored results" label was designed precisely to keep context persistent during scrolling for text ads. Whether a comparable mechanism will be applied to the related products grid section has not been disclosed.

Context: years of label and placement changes

The question of how Google labels and positions ads has a long paper trail. In July 2025, Google removed the prominent "Sponsored" label from its "Find Related Products & Services" units, which are non-biddable commercial suggestion units that direct users to related search queries. Ginny Marvin, Google's Ads Liaison, clarified at the time that those units are not auction-based and that advertisers do not pay per click. The distinction mattered legally and commercially - they are not ads in the traditional paid-placement sense. But the visual removal of the label drew scrutiny from industry observers who questioned whether users could distinguish commercial suggestions from organic query suggestions.

That episode set a pattern that has repeated. Google groups sponsored ads under single header was documented in September 2025, when digital marketing professionals observed the individual "Sponsored" label being replaced with a single grouped header for multiple ads. Each change prompts debate about whether Google is moving toward greater or lesser clarity about what is a paid placement.

For advertisers, the broader shift creates new inventory opportunities but also new complexity. Google unveiled shopping ads in AI Mode in February 2026, extending paid placements into conversational search for the first time at scale. AI Mode had reached over 75 million daily active users at that point. The shopping ad format there sits inside AI-generated conversations during product discovery, labeled as sponsored within the dialogue. That surface operates differently from the grid-based placements on standard search - the auction logic, the user intent signals, and the click behavior all differ.

What the AI label test might indicate

The AI label appearing on standard search ads raises a separate set of questions from the placement expansion. Search ads served through Responsive Search Ads already use AI to assemble ad creative dynamically - selecting which headlines and descriptions to combine from advertiser-provided assets based on predicted performance. Performance Maxcampaigns extend this further, using AI to determine format, placement, bidding, and creative simultaneously. AI Max for Search, announced in 2025, adds AI-assisted query expansion and creative generation to search campaigns.

If the AI label is intended to disclose that a specific ad's creative was generated or significantly modified by AI tools, it would represent a new category of ad disclosure. Most current labeling discloses the commercial relationship between the user and the advertiser, not the production method of the creative itself. A label signaling AI involvement in the creative or targeting process would be a different kind of disclosure entirely - one that several regulators in Europe and the United States have begun examining in the context of AI-generated content.

The label's current behavior - displaying the designation but providing no information when tapped - suggests the feature is in an early exploratory phase. Google's standard process for SERP experiments involves testing visual and functional elements on small user samples before deciding whether to expand or drop them. Clark's observation that two visual variants exist simultaneously - the rounded background and the information icon variant - is consistent with the kind of A/B testing Google runs before committing to a design direction.

Implications for retail advertisers

For brands running Shopping campaigns, the expansion of sponsored placements into the related products section is directly relevant. That section functions as a cross-sell and discovery layer. Users searching for bed sheets, as in the documented example, may encounter products from other retailers or adjacent product categories as sponsored tiles in the related products section. This differs from the intent of a user who has explicitly navigated to the Shopping tab or typed a specific product query into a search bar.

The commercial intent of users interacting with the related products section may vary widely. Some are actively comparing options. Others are browsing adjacent products after already finding what they needed. Insertion of paid inventory at this layer means that Shopping ads can now reach users at a stage of the journey that was previously served only by organic product recommendations - a discovery mode that Google's own product surfaces have historically positioned as editorially curated.

For those managing retail media budgets, the surface addition requires attention to where impressions are being recorded and what audience context accompanies them. Whether the related products section will be reportable as a distinct placement in Google Ads reporting, or whether it will aggregate into existing Shopping surfaces, has not been disclosed. The Google Ads API v24 release on April 22, 2026, included retail filter targeting for Shopping campaigns, which adds granularity for advertisers managing placements across the expanded surfaces - though how granular that reporting goes for specific surfaces like the related products section is not yet confirmed.

Timeline

Summary

Who: Google, with the changes documented by SERP researcher Brodie Clark via the SERP Alert newsletter and reported by Search Engine Roundtable.

What: Two separate Google search advertising developments. First, Google is testing an AI label attached to some mobile search ads, with two visual variants observed. Clicking the label provides no additional information. Second, sponsored ads have been observed appearing in the "related products" grid section of standard search results pages, extending paid placements into a surface previously associated with organic product discovery. This follows Google's introduction of sponsored tiles into the main search results grid in early April 2026 and into the Shopping tab free listing grid on April 20, 2026.

When: The related products sponsored placement was documented on April 22, 2026. The AI label on search ads was documented and reported by Search Engine Roundtable on April 27, 2026.

Where: The AI label experiment has been observed on mobile Google Search. The related products section sponsored placements were observed on desktop Google Search, visible in a query for "bed sheets for king beds."

Why: Neither development has been formally announced or explained by Google. The AI label test may be connected to Google's expanding use of AI in ad creation through Responsive Search Ads, Performance Max, or AI Max for Search, though the exact trigger or meaning of the label has not been disclosed. The expansion of sponsored placements into additional grid surfaces follows a pattern, documented across multiple surfaces since early 2026, of Google introducing paid inventory into areas of the search results page that had previously shown only organic listings.

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