Glossary

Learn about product and technical terms, and get their definitions in our Glossary.

User Agent

A user agent is a piece of information, usually a string, that browsers, bots, or other clients send to web servers in HTTP headers. It identifies the client software, operating system, and sometimes device type. Web servers use user agent strings to tailor responses, serve compatible content, or track usage patterns. User agents are commonly used in web development, analytics, and bot detection.

What is a User Agent?

A user agent is a string included in HTTP requests by browsers, bots, or other clients to identify themselves to web servers. It typically contains information about the client software, operating system, and device type. Web servers use user agent strings to deliver appropriate content, optimize compatibility, and analyze traffic. User agents play a key role in web development, analytics, and security.

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