A video card, also known as a graphics card, is a hardware component in a computer that generates and renders images, animations, and videos. It processes data from the computer's CPU and converts it into visual output for the monitor. Video cards are essential for gaming, graphic design, and video editing, as they enhance the visual performance and quality of the display. Most video cards come with their own memory, known as VRAM, which allows them to store textures and images for quick access. They connect to the computer's motherboard via a PCIe slot and can support multiple monitors. Popular brands include NVIDIA and AMD, which offer a range of models to suit different performance needs.