The primary use of a Field-Programmable Gate Array (FPGA) is to provide customizable hardware functionality. FPGAs are integrated circuits that can be programmed after manufacturing, allowing developers to configure them for specific tasks or applications. This versatility makes FPGAs popular in various fields, such as telecommunications, automotive, and medical devices. They can perform complex computations and handle high-speed processing tasks, enabling applications like signal processing, image processing, and machine learning. Moreover, FPGAs can be reprogrammed as technology advances, extending their operational lifespan.