Why doesn't browsersync work for a dynamic site?

Question

xampp

I installed wordpress on xamp, I want to add a hot reload to display the changes, but on the command

browser-sync start --proxy "localhost/my-site --files "**/*" --no-notify

gives an error message

The term 'browser-sync' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and     
try again.

Answer 1

It was necessary to install browser-sync globally