Here's How to Play Pokémon Go, the World's Newest Obsession

Tap on the dashboard of Pokémon in the lower right of your screen. There you can see what Pokémon are around and if it's worth it to stick around. Different Pokémon will have a variety of Combat Power (CP) levels based on how you're doing as a trainer and your own level. You can change your Pokémon's CP level or evolve it with different items like stardust or candy.