Charts
One particular feature of Last.fm is the automatic weekly generation and archiving of detailed personal music charts and statistics which are created as part of its profile building. Users have several different charts available, including Top Artists, Top Tracks, and Top Albums, as well as Weekly Top Artists and Weekly Top Tracks. Each of these charts is based on the actual number of people listening to the track, album or artist recorded either through an Audioscrobbler plugin or the Last.fm radio stream.
Additionally, charts are available for the top tracks by each artist in the Last.fm system as well as the top tracks for individual albums (when the tagging information of the audio file is available). Artist profiles also keep track of a short list of Top Fans, which is calculated by a formula meant to portray the importance of an artist in a fan's own profile, balancing out users who play hundreds of tracks overall versus those who play only a few.
As the information generated is largely compiled from the ID3 data from audio files "scrobbled" from user's own computers, and which may be incorrect or misspelled, there are many errors in the listings. Tracks with ambiguous punctuation are especially prone to separate listings, which can dilute the apparent popularity of a track. Artists or bands with the same name are not always differentiated. The system attempts to translate some different artist tags to a single artist profile, and has recently attempted to harmonise track names.
Charts are also available for user groups, thus providing a view into a demographic slice, and can reveal interesting new music based on the preferences of similar users.
Read more about this topic: Last.fm
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