Hatha is a general category that includes most yoga styles. It is an old system that includes the practice of asanas (yoga postures) and pranayama (breathing exercises), which help bring peace to the mind and body, preparing the body for deeper spiritual practices such as meditation.
It will be relatively gentle, slow and great for beginners or students who prefer a more relaxed style where they hold poses longer.
Hatha simply refers to the practice of physical yoga postures, meaning your Ashtanga, Vinyasa, Iyengar and Power Yoga classes are all Hatha Yoga. The word “hatha” can be translated two ways: as “willful” or “forceful,” or the yoga of activity, and as “sun” (ha) and “moon” (tha), the yoga of balance.
The main difference between a Hatha and Vinyasa yoga is the pace and the goal of the practice. Hatha yoga, according to Yoga Journal, is designed to align and calm your mind, body and spirit. ... Vinyasa classes often repeat series of poses and often involve increasing body heat — and sweat — and building strength.