Summarize this article:

Pandora is a free app (with a paid option) that allows you to listen to streaming music on your Android. Tap Sign Up, then follow the on-screen instructions to create your account. You can listen to any of suggested stations, or tap Browse Genre Stations for more options. Enter one artist to create a station that plays similar music, or multiple artists to add variety. See Create a Pandora Station to learn how to further customize your station.

Summary:
Download Pandora from the Play Store. Sign up for an account. Tap Stations to hear streaming music by genre. Tap Create a New Station to curate your own station.