Translations:Metrics and groups/1/en

User agent

User agent is a header that a browser, program, or application sends to a server when accessing a website. The user agent typically contains the browser name, its version, the engine on which the browser is based, the operating system and its version. The user agent can also contain the name and model of the mobile device on which it is running and some other information. In other words, it is a browser's business card.