What is X-UA-Compatible?

X-UA-Compatible - a meta-tag used in web technologies to specify compatibility mode for Internet Explorer browser to render websites correctly. This tag is used when a website's code might not be compatible with the latest version of Internet Explorer and can cause display issues.

The X-UA-Compatible tag allows website developers to specify which IE version should be used by the browser for rendering. It helps prevent display problems that may arise due to old or outdated codes, providing users with an optimal browsing experience regardless of their browser choice.

This meta-tag has been essential in making sure older websites are still accessible on modern browsers without breaking anything; otherwise, they would have disappeared as technology advances rapidly.