The music at a wedding is very important from wedding March to the music played at the reception.
There are many different types of music you may use from music performed by a live band or a single vocalist to pre-recorded songs performed by a DJ. The choice is really up to the couple being married. Music is usually used to announce the bride and groom or in the traditional wedding March which is over 100 years old as the bride walks down the aisle this song is usually referred to as here comes the bride. Many couples have their favorite song and may use it during the ceremony or at the first dance at the reception. Like I said before the wedding music is really the choice of the bride and groom and depends on their taste in music.