"64-bit" refers to the way a computer's processor handles data. It can process 64 bits of information at once, which allows for more memory and faster performance compared to older 32-bit systems. This means that a 64-bit processor can access a larger amount of RAM, enabling it to run more applications simultaneously and handle more complex tasks. In practical terms, using a 64-bit operating system allows users to take full advantage of the capabilities of a 64-bit processor. This is especially beneficial for tasks like gaming, video editing, and running large databases, where higher performance and more memory are crucial for efficiency.