A "Single-Core" processor refers to a computer's central processing unit (CPU) that has only one core. This means it can handle one task at a time, processing instructions sequentially. Single-core processors were common in early computers and are simpler in design compared to multi-core processors, which can perform multiple tasks simultaneously. While single-core CPUs are less powerful than their multi-core counterparts, they can still be effective for basic tasks like web browsing and word processing. However, as software becomes more complex and multitasking becomes essential, many users now prefer multi-core processors for better performance and efficiency.