Q:

What does this symbol mean?

I've gotten a new song from my music teacher though, she never mentioned anything about this symbol.

I'm rather new, can anyone explain to me what this represents?

A:

That's an eighth note (quaver) rest. If you know how to play the quarter note (crotchet) rest in the previous measure, then it's the same thing, just half as long.
I suggest you bookmark the following page for future reference:
Musical symbols.

