A lead vocalist is often responsible for writing the main melody of songs or coming up with vocal lines, harmonies and lyrics. In many bands, the lead vocalist is one of the main songwriters and is the band member most audience members will relate to. For this reason, the vocalist should exude the right kind of stage presence for your chosen genre.
Backup vocalists can add a dynamic to your live performance that will help you stand apart from other bands. When good backup harmonies are added to a tight band, they can add a level of polish and professionalism that is otherwise difficult to reproduce.