Perhaps you have had trouble unwrapping food wrapped with saran wrap. That problem can be solved with a twist of the wrap.
The advantage of putting the twisted-rope portion onto the wrap is that it is easy to find. That makes it easy to start unwrapping the saran wrap and expose the food. The problem solved is that of the thin layer of saran wrap disappearing and being hard to find. By starting your unwrapping operation at the twist you don’t waste time picking at the material searching for an end to lift. It might seem trivial, but I have wasted time almost every time I have unwrapped a brownie and this is my solution. By the way it works on other food too. The half second making the twist is quicker and less frustrating than wasting ten seconds and more trying to find an end to start the unwrapping operation.