A dual-core chip is a type of computer processor that contains two independent cores on a single piece of silicon. Each core can execute its own instructions, allowing for more efficient processing and faster performance compared to a single-core chip. This means that while one core handles one task, the other can handle another, resulting in improved multitasking capabilities and overall speed. Dual-core chips are commonly used in computers, smartphones, tablets, and other electronic devices where efficient processing is essential.