Mem is a term used in various contexts, often referring to a unit of memory in computing. It can denote the amount of data that can be stored or processed by a computer system. In this sense, it is crucial for the performance of applications and overall system efficiency. In a different context, Mem can also refer to a character in the popular video game series Undertale. This character is known for their unique abilities and role within the game's narrative, contributing to the overall experience and storytelling.