Pandora Radio or Pandora Internet Radio – is an automated music recommendation service and “custodian” of the Music Genome Project. The service, operated by Pandora Media, Inc., is fully available only in the United States, with limited access in Australia and New Zealand. The service plays musical selections similar to song suggestions entered by a user. The user provides positive or negative feedback for songs chosen by the service, which are taken into account for future selections.
While listening, users are offered the ability to buy the songs or albums at various online retailers. Over 400 different musical attributes are considered when selecting the next song. These 400 attributes are combined into larger groups called focus traits. There are 2,000 focus traits. Examples of these are rhythm syncopation, key tonality, vocal harmonies, and displayed instrumental proficiency.
The service has two subscription plans: a free subscription supported by advertisements, and a fee-based subscription without ads. There are also advertisements in Pandora Mobile for mobile phones and the Pandora in The Home computer appliance. Most users choose the free subscription.