Knowledge base v2.13.0 · Community edition · data through 2 October 2026
Thing · Product
Google's shopping results and the Shopping tab, built from Merchant Center feeds and product markup.
Documented in
Google's Inside Googlebot post (March 2026) says Googlebot is today just one user of a centralized crawling platform, and that dozens of other clients, such as Google Shopping and AdSense, send their crawl requests through the same infrastructure under other crawler names, with only the larger ones documented.
Search Central blog (31 March 2026) · Day 1 · How crawling works
Google's Merchant Center help says products and details crawled from an online store can show up on Google even when they are not marked up with schema.org or added in Merchant Center, and lists the Shopping tab among the places Merchant Center free listings appear.
Google Merchant Center Help · Day 3 · How Search results are born
Google's crawler list says robots.txt rules addressed to the Storebot-Google user agent affect all surfaces of Google Shopping, such as the Shopping tab in Google Search.
Merchant Center's product_detail attribute takes up to 100 specifications, each a section name, attribute name and attribute value, and Google's help says clean key-value specifications improve product details on Google Shopping and AI-driven surfaces.
Google Merchant Center Help · Day 3 · Shopping on Search: Beyond the blue links
Slide and stage claims that name it, the ones Google’s documentation does not cover first.
Schema.org product markup on websites is another source of billions of product offers for Google Shopping, next to merchant feeds.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google Shopping said highly prescriptive product data is a lot of hard work for merchants and is no longer needed for LLMs.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google Shopping called rich data with light structure the AI sweet spot: a little structure that helps the AI system understand the data, not deep, highly nested, complex structures.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Some structure is much better than none for AI systems, because without structure the model does not really know what is going on, Google Shopping said.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google Shopping named the downside of adding Q&As and documentation to product markup: the page's markup becomes somewhat bigger.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
To appear in the Shopping tab of Google Search, a product must be submitted in Google Merchant Center; product structured data alone is not enough.
Behind the visible attributes, small pieces of product data such as brand and UPC or other barcodes are very important for Google Shopping's query understanding, retrieval and ranking.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google Shopping uses its own crawler, Storebot (Storebot-Google), instead of Googlebot because it needs fresh product information, prices, availability and shipping details and therefore crawls much more often.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Basic, well-specified product attributes such as price, brand and availability remain as important as ever for Google Shopping.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Web markup is an efficient and unambiguous way for sites to share product data with Google, Google Shopping said, repeating the Day 2 structured data talk.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google Shopping pointed to a Google holiday shopping blog post with early results from real merchants using the conversational attributes, and to the Merchant Center Help Center and schema.org for the attributes and properties.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google Shopping described product data for AI as early days in a fast-moving area, with many more changes to come.
Alex Jansen · Day 3 · Shopping on Search: Beyond the blue links
Google's free listings help says crawled store products can appear on Google without markup or Merchant Center but does not say whether that includes the Shopping tab; for a shop that wants Shopping tab visibility, the stage rule that Merchant Center is required is the safe working assumption.
Ibrahim Anjro · Day 3 · How Search results are born
For an online shop, Product structured data is enough for product rich results and Google Images product annotations, but the Shopping tab needs a Merchant Center feed too; keep feed and markup values identical, since Google can use the markup to validate the feed.
Ibrahim Anjro · Day 3 · How Search results are born
Kit items about Google Shopping: their own words name it, or several of the claims they rest on do.
Rests on 9 claims, 3 of them naming Google Shopping; its own words name Google Shopping
Let Storebot-Google crawl product, cart and checkout pages, through robots.txt and bot protection
Rests on 6 claims, 2 of them naming Google Shopping; its own words name Google Shopping
Also inglossary terms Storebot-Google, Merchant Center
To appear in the Shopping tab of Google Search, a product must be submitted in Google Merchant Center; product structured data alone is not enough.
Google Shopping uses its own crawler, Storebot (Storebot-Google), instead of Googlebot because it needs fresh product information, prices, availability and shipping details and therefore crawls much more often.
Google's crawler list says robots.txt rules addressed to the Storebot-Google user agent affect all surfaces of Google Shopping, such as the Shopping tab in Google Search.
Things named in the same claim, with the number of claims they share.