Complex sentence: The Official cheerleaders of FEU, also known as "Boosters" it is a supporting group for the varsity teams of the school, they're the group exceptionally loud voices, and solid hand gestures.
Split into simpler sentences: The Official cheerleaders of FEU, also known as "Boosters", is a supporting group for the varsity teams of the school. They're the group exceptionally with loud voices, and solid hand gestures.