I have already enabled browser caching on my apache but there's another thing, audit report of chrome for my web page suggests "Leverage proxy caching (35)". Any idea how to do that?
You only want to allow public proxies to do caching on resources that are public (accessible to the world, no authentication, etc) and static (the same content is delivered to all users). So you may want to limit this to just content where it makes sense, like JS, CSS, and image files.
That said, what you'll want to do is to set the