Google-Agent: The Web’s new visitor just got an identity
- May 19
- 1 min read
SEARCH ENGINE JOURNAL — Google-Agent is the user agent string for AI systems running on Google infrastructure that browse websites on behalf of users.
When someone asks an AI assistant to research a product, fill out a form, or compare options across websites, Google-Agent is the thing that actually visits the page. Project Mariner, Google’s experimental AI browsing tool, is the first product using it.
This is not Googlebot. Googlebot crawls the web continuously, indexing pages for search. Google-Agent only shows up when a human asks it to. That distinction changes everything about how it operates.
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