Merchant Center adds AI Performance Insights for share of voice

Merchant Center is getting a dedicated report for the part of shopping search that used to be invisible: what happens when a product shows up inside an AI Mode answer, an AI Overview or a Gemini shopping conversation instead of a standard search results page. Google announced AI performance insights on 20 May 2026, alongside a separate feature for conversational product attributes, and framed both as tools for a shopping journey that increasingly starts as a conversation rather than a keyword.

The four things the report measures#

Google’s Merchant Center Help documentation defines AI performance insights as four components, each addressing a different blind spot in AI-driven shopping traffic.

Share of voice shows a brand’s visibility on AI-driven experiences across Search and Gemini, benchmarked against brands Google considers similar. It is the headline metric: not raw impressions, but a competitive share.

Shopping funnel performance breaks results into the stages of a shopping journey Google already uses to classify conversational queries: discovery, evaluation and purchase. A merchant can see whether they show up when someone is exploring options, comparing specifications, or close to buying.

Product term insights surface the popular product terms searched by users in AI conversations, alongside the merchant’s share of voice for each term. This is closer to a conversational-query report than a keyword report.

Product attribute insights flag the specifications users search for most, such as color, style or material, and identify which products lack that structured data using an attribute completeness score.

Rollout markets and limits#

Google’s own blog post and Search Engine Land’s coverage both describe the rollout as reaching the United States, Canada, Australia, India and New Zealand, arriving “in the coming months” rather than simultaneously. Google’s Merchant Center Help page confirms the same five markets and adds two limits worth noting before treating the numbers as complete: the data currently covers English-language queries only, and it is strictly limited to organic AI traffic, such as free listings, with Paid Ads traffic excluded.

This is a separate story from the 2026 Merchant Center product data specification update, which changed shipping and video attributes and the minimum image resolution. AI performance insights adds a reporting layer on top of the same catalog; it does not change what a merchant is required to submit.

Why we care#

Share of voice is the metric that matters here, because it is the first time Merchant Center has offered any competitive visibility number for AI surfaces at all. A merchant can currently see clicks and impressions for their own listings, but not how that compares to similar brands showing up in the same AI Mode or Gemini conversation. Combined with product attribute gaps, the report gives merchants a concrete lever: fill in the missing color, style or material data that AI systems use to match a query, and watch whether share of voice moves. Until the English-only, organic-only limits lift, though, treat the numbers as a partial view rather than the full picture of AI shopping performance.