Well, I'm just learning ASP.Net, and after reading some books I found that there are this things called Modules which tweak a Request and Handlers that (I think) tweak a response. The problem is that I can't understand how they really work, so I prefer just skip this part and come back to them when I get a bit more comfortable with the ASP.Net framework.
My question is, are they a big part of this framework? Am I going to use them a lot?