Complex sentence: In a small number of Protestant churches, every member of the choir or band is considered to be a worship leader, as it is the role of each person to help "lead" the congregation in worship by truly worshipping God with their voice or instrument.
Split into simpler sentences: In a small number of Protestant churches, every member of the choir or band is considered to be a worship leader. They believe it is the role of each person to help "lead" the congregation in worship by truly worshipping God with their voice or instrument.