The HTTP Standard doesn't limit the method to the well-known predefined methods (GET, POST, DELETE, PATCH, PUT, OPTIONS, HEAD)
In some cases, some systems use their own custom HTTP Methods.
For example - in Cache world (e.g. with Varnish) it is very common to use PURGE method to invalidate content from the cache
The HTTP Standard doesn't limit the method to the well-known predefined methods (GET, POST, DELETE, PATCH, PUT, OPTIONS, HEAD)
In some cases, some systems use their own custom HTTP Methods.
For example - in Cache world (e.g. with Varnish) it is very common to use
PURGEmethod to invalidate content from the cache