What is framework ?

Answer 1

its a premade code that working as a base for your project. mostly made to make your coding process much easier and/or faster

imagine a framework of a house its almost identical with other house framework in the area, you know it's a house. but then you can build the wall, put the window, choose the paint and decoration yourself to make it your house.
its different, but has a same base

Answer 2

i dont have any experience in .net
but i do know some php framework like CI

they provide us with easy database handling, security, routing, etc etc. something that we actually need, but its already provided by them. so we can put more focus on our website building