AVX, or Advanced Vector Extensions, is a set of instructions for computer processors that enhances their ability to perform parallel processing. This technology allows a CPU to handle multiple data points simultaneously, improving performance in tasks such as scientific calculations, video processing, and 3D rendering. Introduced by Intel in 2011, AVX extends the capabilities of previous instruction sets like SSE (Streaming SIMD Extensions). It supports wider vector registers, enabling more data to be processed in a single instruction. This results in faster execution of applications that can leverage these advanced features, making it beneficial for both consumers and professionals.