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AI agent

An AI assistant that browses websites and completes tasks on a person’s behalf, reading pages through the accessibility tree.

Also called
agentic browser

An AI agent, or agentic browser, is an assistant that can open websites, read them, and act on them for a person: compare products, fill a form, or complete a purchase. It does not see the page the way a person does. It works from the page’s structure, and Google’s Lighthouse documentation says agents review the accessibility tree to find interactive elements.

That makes the same fixes count twice. A button with no name, an image with no description, or a form field with no label blocks a person using a screen reader and an agent alike. We do not have a measured figure for traffic from agents, and we do not make one up.

Source

Accessibility for agents

Chrome for Developers, Google, 2026. Checked .

Accessibility tree
The structure a browser builds from a page that screen readers and AI agents read to understand it.
Accessible name
The name a control is announced by, taken from its label, its text, or its alt text.
Alt text
The written description of an image that a screen reader reads aloud and a search engine indexes.

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