UserAgents

A user agent is a piece of software, usually a web browser, that acts on behalf of a user. When a user browses the internet, their user agent sends a string of text to web servers. This string, known as the user agent string, contains information about the browser, its version, the operating system, and sometimes even the device type.

Web servers use the user agent string to tailor content and functionality to the user's specific setup. For example, a website might serve a different version of a page to a mobile device than to a desktop computer, or it might disable certain features that are not compatible with a particular browser. This allows for a more optimized and personalized browsing experience.

User agent strings are also used for analytics and debugging. Website owners can track which browsers and operating systems their visitors are using, which can help them identify trends and troubleshoot any issues. However, user agent strings can also be spoofed, meaning they can be altered to make a browser appear as something it is not. This is sometimes done for privacy reasons or to access content that is restricted to certain user agents.