c++ #include <>

Question

For some reason,c++ tutorials I've read or watched online dont give full explanations of these very important libraries and their contents.I only ever see a code snippet here and there with #include<something> and you dont really understand why they used that particular one.
Can anyone point me to a place I can find good explanations that even a newbie like me would understand?

Answer 1

I generally use the site that Naitomea listed.

Answer 2

Here you can find a lot important libraries:
http://www.cplusplus.com/reference/

Answer 3

Thanx a lot.I'll check it out