A computer monitor is an output device that displays visual information from a computer. It allows users to see text, images, and videos, making it essential for tasks like browsing the internet, gaming, and graphic design. Monitors come in various sizes and resolutions, with common types including LCD and LED displays. Modern monitors often feature additional technologies such as refresh rates and response times, which enhance the viewing experience, especially for gaming and video playback. Many monitors also include connectivity options like HDMI and DisplayPort to connect to different devices, ensuring versatility in use.