What is the purpose of a toilet flush gasket and how does it contribute to the proper functioning of a toilet?

A toilet flush gasket is a rubber or plastic seal that sits between the toilet tank and the bowl. Its purpose is to create a watertight seal to prevent leaks and ensure proper flushing. The gasket helps maintain the pressure needed for a strong flush and prevents water from leaking out of the tank. This contributes to the proper functioning of the toilet by ensuring that water is effectively and efficiently flushed from the tank into the bowl.