You walk around until you see a Pokemon near your player, then tap it. Then the game goes into "camera" mode where you can snap a picture of the pokemon placed

You walk around until you see a Pokemon near your player, then tap it. Then the game goes into "camera" mode where you can snap a picture of the pokemon placed in the real world, or throw pokeballs at it by swiping your finger properly. You walk around and your player walks around using the GPS.