The reason why Zumba is so popular is because everyone can do it. Because there are so many different types of Zumba, it's pretty easy to find one you like.
Zumba is a fusion of Latin and International dance themes that create a dynamic exciting workout based on the principle that a workout should be fun and easy to do. The routines feature aerobic/fitness interval training with a combination of fast and slow rhythms that tone and sculpt the body.
The most popular is the Zumba Fitness which is your standard class. It has high-energy rhythms and distinctive Latin beats that will guarantee you're sweating and having a great time. Zumba Toning is where you use toning sticks. You can think of them as of them as fitness tools which strengthen your abs, glutes, arms, and thighs.