FLOPS (Floating Point Operations Per Second) serves as a key metric for measuring computing power, particularly in the context of GPUs and other high-performance computing devices. It quantifies the number of floating-point calculations a device can perform in one second. For instance, a GPU advertised as capable of 8 TFLOPS (tera-FLOPS) can execute 8 trillion floating-point operations per second, highlighting its computational throughput and efficiency in handling complex numerical tasks.