scrobble

Part of the appeal of Web 2.0 is to find other people who share similar interests, herein lies the meaning of "scrobbling." To "scrobble" a song means that when you listen to it, the name of the song is sent to a Web site and added to your music profile. 

Here's how it works: Once you've signed up and downloaded Last.fm for example, you can scrobble songs you listen to on your computer or iPod automatically. As a social network, once you start scrobbling yourself, you can see what artists you really listen to the most, view your listening habits on your profile page, and allow others to see your tastes in music. Companies use this data to organize and recommend music to people, to create personalized radio stations, and to see what other users listened to the most.