What does <meta http-equiv=“X-UA-Compatible” content=“IE=edge”> do?

Question

What\'s the difference if one web page starts with

Answer 1

2.1.3.5 X-UA-Compatibility Meta Tag and HTTP Response Header

This functionality will not be implemented in any version of Microsoft Edge.

See https://msdn.microsoft.com/en-us/library/ff955275(v=vs.85).aspx

Yes, I know that I'm late to the party, but I just had some issues and discussions, and in the end my boss had me remove the X-UA-Compatible tag remove from all documents I've been working on.

If this information is out-of-date or no longer relevant, please correct me.