A playlist is a custom compilation of songs and video. You might want to create a playlist to:
Suit a specific mood or occasion. For example, you could create a playlist to listen to at a dinner party, while you’re exercising, or for a wedding.
Select certain songs to share with others on your local network or to sync with your iPod.
Burn a CD of songs to play on a CD player.
Organize your iTunes library.
There are five kinds of playlists (you create the first kind yourself; iTunes automatically creates the other four):
With some iPod models, you can also create playlists on the iPod when it isn’t connected to your computer. For information about on-the-go playlists, see the documentation that came with your iPod.