Yoga is not a religion. It has no creed or fixed set of beliefs, nor is there a prescribed godlike figure to be worshiped in a particular manner. Religions for the most part seem to be based upon the belief in and worship of things (God or godlike figures) that exist outside oneself.
A symbol, position or gesture on hands signify a Mudra. There are also body asana / postures, breathing techniques, eye position are also termed as Mudra.
Yoga in daily life is not only for the spiritual progress. It is your approach towards yoga in daily life. One can use yoga for improving personal and professional life to cope up with unexpected situations and difficulties in the path of life.
Kundalini Yoga - It is basically from the Shaktism and Tantric school of Hindhuism. It is believed that, the female energy that is the coiled serpent that resided at the base of the human spine. It will be awakened by the practice of meditation and other sadhanas.
Vinyasa Yoga - Movement synchronized with Breathe. Vinyasa yoga is a sequence of asanas that flow from one posture to another. Ashtanga Yoga, Bikram, Power Yoga etc., could be considered as Vinyasa yoga.
Hatha Yoga – The original and the only classical traditional yoga system. One should have core strength, body-mind balance, flexibility, stability for this yoga.
Ashtanga yoga is one of the most popular yoga styles in the world. Great Yoga K. Pattabhi Jois made promoted this style and spread across the worlds. Millions of people are practicing Ashtanga yoga worldwide the famous style of Ashtanga yoga teaching is Mysore style.