Ok, so pretty much I'm a beginner. But I'm trying to learn Wonderwall by Oasis. I found this tab:


It is rated good and everything, but something on it is confusing me. Where it says you are supposed to put a capo on the second fret, but on some of the chords it says play it at zero. Does that mean that zero is actually the second fret with the capo? And you just play the 2nd fret is if it were open? Becuase if that's not the case, then I am confused. Now bring all your knowledge and make me feel stupid.