I have a site on Godaddy Linux shared hosting and I wanted to improve caching for some elements, but apparently Godaddy did not install mod_expires. I see no other way to increase caching expiration for images and stuff (the default expiration time is apparently 15 seconds which is not very useful) and I was wondering why mod_expires is not installed.
I'd think it is also good for the hosting provider, because improving caching means less server requests, so it seems obvious it should be installed..
Is there a drawback of installing mod_expires from the hosting company's point of view? Do you know a possible reason why it's not available? I'm curious.