Help with macro lens explaination

Help with macro lens explaination

Hey everyone, i'm an amature photographer, actually got my D90 a little under a month ago, first DSLR and im still learning. Im picking up pretty quickly on all the different kinds of basic and prime lenses, and fisheyes, but i just cant figure out macro. I mean, there are 60mm prime macros and then huge zoom macros and i just dont know, first the difference besides zoom, whether they are 1:1 and what that ratio really means, and any recomendations on a good solid amature macro lens? Thanks