What is the purpose of a refrigerator water line splitter and how does it work in a home appliance system?

A refrigerator water line splitter is used to connect multiple appliances, such as a refrigerator and an ice maker, to a single water supply line. It works by dividing the water flow into separate lines, allowing each appliance to receive the necessary water supply without affecting the other. This helps in efficiently distributing water to different appliances in a home.