The main use of a graphics processing unit (GPU) is to accelerate the rendering of images and video by handling complex calculations much faster than a central processing unit (CPU). GPUs are designed for parallel processing, making them suitable for tasks like real-time rendering in video games, 3D modeling, and simulations. Additionally, they play a crucial role in machine learning and artificial intelligence applications, where vast amounts of data need to be processed quickly for training algorithms. As computational demands increase, GPUs have become essential in various technological fields.