A 64-bit processor is a type of computer processor that can handle data in 64-bit chunks. This means it can process more data at once compared to 32-bit processors, which only handle 32 bits. The increased bit width allows for better performance, especially in tasks that require large amounts of memory, such as video editing and gaming. Additionally, 64-bit processors can access a larger amount of RAM, theoretically supporting up to 16 exabytes of memory. This capability is beneficial for modern applications and operating systems, like Windows and Linux, which are designed to take advantage of the enhanced performance and memory capacity offered by 64-bit architecture.