A monitor is a device that displays information on your computer. Monitors are very important for any computer, and they come in different shapes and sizes to suit your needs.
Your monitor should be easy to read from both close up and far away so the image is clear when you are working with it. There are two main types of monitors: LCDs (Liquid Crystal Displays) or CRTs (Cathode Ray Tubes). Which one is best for you depends on what you want out of your monitor- if you work with images, graphics or videos then LCD monitors will be great because they have a faster refresh rate than CRT monitors which makes them better suited for viewing video playback.