What bits to use for certain materials and jobs?

I found a webpage on inventables that told you what each style of bit is for and what material they work best with, I can’t seem to find that webpage again and I really need to reference that page again to see what each bit I have works best for what. Please Help!

Here are two. We had an issue we are trying to resolve with the pictures on the first one:

http://blog.inventables.com/2014/07/milling-101-understanding-milling-bits.html