A graphics card is a computer component responsible for rendering images, videos, and animations. It processes data from the computer's CPU and converts it into visual output that can be displayed on a monitor. This is especially important for tasks that require high-quality graphics, such as gaming, video editing, and 3D modeling. Most modern graphics cards come with their own memory, known as VRAM, which helps improve performance by allowing the card to store and quickly access graphical data. Popular manufacturers of graphics cards include NVIDIA and AMD, both of which offer a range of products for different performance needs and budgets.