I realize that this is a very simplistic explanation, but think of quantum entanglement like this:
You have 2 cubes. Each cube can be only either blue or green. You have no idea what color each cube is as you packed them into boxes for mailing across the galaxy in a completely dark room. They are then mailed.
Now, you open your box. Turns out that your cube is green. You instantly know that the other cube is blue, even if it's on the other side of the galaxy, however, you have no way of communicating your discovery to the other party.
You now have instant knowledge of what color the remote cube is, but no information has been transferred.