A quad-core processor is a type of computer chip that contains four separate processing units, or "cores," on a single die. This design allows the processor to handle multiple tasks simultaneously, improving overall performance and efficiency. Each core can work on different tasks at the same time, making quad-core processors particularly effective for multitasking and running demanding applications. Quad-core processors are commonly found in various devices, including laptops, desktops, and smartphones. They are especially beneficial for activities like gaming, video editing, and running complex software, as they can distribute workloads across the four cores, leading to faster processing times and smoother performance.