What makes Best A Cappella by Rockapella notable?

This album captures the essence of a cappella music in the early 2000s and reflects the growing popularity of vocal groups during this time. It achieved notable recognition, appealing to both longtime fans and new listeners, and helped cement Rockapella's place in contemporary a cappella culture. By 2002, Rockapella had established themselves as a leading force in the a cappella genre, following their significant exposure from the 'Where in the World Is Carmen Sandiego?' television show. 'Best A Cappella' serves as a compilation of their signature style, showcasing their musical versatility after several successful albums that solidified their reputation.