Good evening- I am trying to take two lists and finding the matching values
on both lists. I have tried using vlookup, but haven't had much luck. Is
that the right function to use? What is the difference between vlookup and
lookup?

Here is what I've got- two worksheets (A and B).
=VLOOKUP(B4,B!B:B,2,FALSE)

Any help would be greatly appreciated!

Thank you.