: Another compatibility tag used to let servers know the browser can handle sites designed for Safari/WebKit.
: The layout engine that renders web pages. Edge uses the Chromium engine, which is derived from Apple’s WebKit.
The string you provided is a , which tells a website's server which browser and operating system you are using. This specific string indicates you are using Microsoft Edge version 107 on a Windows 10 computer.
: A standard prefix used by almost all modern browsers to indicate compatibility with common web standards.