Last.FM is the biggest music database website on Internet. It's famous for the 'Scrobble' system (it counts the music you listen to and add it to the musician profile information). The more your music is Scrobbled, the more listeners you will have on your Last.FM profile.
For one Gig, I will listen up to 5 songs on Deezer that will scrobble on Last.FM.
If you want me to listen more than 5 songs, please check my Extra Gigs.
If you have any questions, feel free to ask me before ordering the Gig!