The term 'Spin Bowler's Delivery' refers to a type of bowling technique used in cricket. The delivery is characterized by the bowler imparting spin on the ball as it is released, causing it to deviate from its expected path. The most common type of spin bowler's delivery is the GOOGLY, which is a delivery that spins in the opposite direction to the bowler's arm. The GOOGLY is a deceptive delivery that can be difficult for the batsman to read and can often result in wickets.