Small Finance Banks are new types of banks licensed by the RBI to promote basic banking services like deposits and lending to unserved/underserved sections. They must adhere to prudential norms like commercial banks and at least 75% of their credit must go to priority sectors. Initially, 50% of their loan portfolio must be for amounts up to Rs. 25 lakh and over time they can apply to become universal banks if they perform satisfactorily. Payment banks will complement traditional banks by ensuring cheaper services and pushing for more efficient payment channels.