A 64-bit processor is a type of computer processor that can handle data and memory addresses that are 64 bits wide. This allows it to process more data at once compared to a 32-bit processor, which can only handle 32 bits. As a result, 64-bit processors can improve performance, especially in applications that require large amounts of memory, such as video editing and gaming. Additionally, a 64-bit processor can access a larger amount of RAM, theoretically supporting up to 16 exabytes of memory. This capability enables modern operating systems, like Windows and Linux, to run more efficiently and support more demanding software applications.