1. First, it is very simple.

2. Second, it is convenient.

1. You can easily and quickly download  you favourite tunes and avoid buying an entire CD just to hear one or two songs.

2. For instance, you can store the songs on various devices such as your MP3 player, computer and mobile phone.

Many sites do not pay royalties to the musicians for the sings you download, which is illegal.

In addition, you you can sometimes get viruses while sharing files with unknown users.