Bike sharing is a transportation system that allows people to rent bicycles for short periods. Users can pick up a bike from designated stations, ride it to their destination, and then return it to another station. This service promotes eco-friendly travel and helps reduce traffic congestion in urban areas. Many cities around the world have implemented bike sharing programs, making it easy for residents and tourists to access bikes. Users typically pay a small fee for each ride or can purchase a membership for unlimited use. Popular bike sharing systems include Citi Bike in New York City and Divvy in Chicago.