1-They're super affordable and easy to transport.
2-They help stretch and warm up your muscles before a tough workout.
3-They are great for functional fitness training.
4-They are incredibly safe to use. With resistance band training, you're in control the entire time. You're not worried about jerking weights, and you're going to protect your ligaments and tendons by controlling your muscles throughout the entire movement.
5-Resistance bands can add muscle-building power to most types of workouts. Resistance bands come in several strengths, making them highly usable by most people.
6-Resistance bands are smaller, and you can keep some right in the drawer of your nightstand.