A monitor screen refers to the physical device used to display visual output from a computer or other electronic device. It is made up of a flat panel display that displays images by backlighting an array of pixels. Monitor screens come in different sizes, resolutions (number of pixels), aspect ratios (proportional relationship between width and height), and panel types (such as TN, IPS, VA, OLED, and QLED) which influence factors such as color accuracy, viewing angles, response time, and contrast. They can be connected to devices via various interfaces such as VGA, HDMI, DVI, DisplayPort, or USB-C.