Also to add to OP, don't get slow play confused with slow roll. Slow roll is when you have the nuts, or a really good hand, and take more time than is needed to show your hand once you've won. It makes the loser believe he has won with his hand since you haven't shown your cards yet at showdown.
I personally don't like to slow play very much, there is a high risk/reward factor. You see people asking why they always lose with AA, and a lot of the times they tried to slow play it, allowing their opponent to have odds
to hit their hand, or hit it for cheap.