This will be explained better in the next part. Goal s are a little more complex. When you play a goal, put it in the middle of the table so everyone can see it. Everytime anyone plays a goal, it replaces the goal allready on the table. The old goal is put in the discard pile, so that only one goal is in play at a time.
Goals define how to win.
Most of them describe a combination of Keepers. That's why it's good to control as many keepers as you can. A few of the goals aren't keeper combinations, but instead describe other ways to win. For example, there's one that makes it so if any player has 10 or more cards in thier hand, they win. When you play an action, put it on top of the discard pile, and then do what it says.