Modern yoga has evolved with a focus on exercise, strength, flexibility, and breathing. It can help boost physical and mental well-being. There are many styles of yoga, and no style is more authentic or superior to another. The key is to choose a class appropriate for your fitness level. To convey its spiritual message and guide sessions, yoga often uses the imagery of a tree with roots, a trunk, branches, blossoms, and fruits. Each “branch” of yoga represents a different focus and set of characteristics.