ARM64 is a 64-bit architecture designed by ARM Holdings, primarily used in mobile devices, tablets, and increasingly in laptops and servers. It allows for more efficient processing and better performance compared to its 32-bit predecessor, ARM32. This architecture supports a larger amount of memory, enabling devices to run more applications simultaneously. The ARM64 architecture is known for its energy efficiency, making it ideal for battery-powered devices. Many popular operating systems, including Android and iOS, utilize ARM64, contributing to its widespread adoption in the tech industry. As a result, it plays a significant role in modern computing.