A quad-core processor is a type of central processing unit (CPU) that contains four separate cores, or processing units, on a single chip. This design allows the processor to handle multiple tasks simultaneously, improving overall performance and efficiency. Each core can execute its own thread of instructions, making quad-core processors particularly effective for multitasking and running demanding applications. These processors are commonly found in various devices, including personal computers, laptops, and smartphones. By distributing workloads across the four cores, quad-core processors can enhance speed and responsiveness, making them suitable for gaming, video editing, and other resource-intensive tasks.