Random Access Memory, or RAM, is a type of computer memory that allows data to be read and written quickly. It is essential for the performance of computers and other devices, as it temporarily stores data that the CPU needs to access in real-time. The more RAM a system has, the more applications it can run simultaneously without slowing down. Unlike permanent storage like hard drives or SSDs, RAM is volatile, meaning it loses its data when the power is turned off. This makes it crucial for tasks that require fast access to data, such as gaming, video editing, and running multiple applications at once.