Screen Resolution is the quality of the image or video displayed by the screen of a monitor or tv. The resolution is based on pixels width x height, for example, a standard HD monitor will be 1080 x 1920. The greater the number for width and height the higher the resolution of your screen and better image quality. Older monitors have lower screen resolution than newer monitors the bottom line HD monitor is 720. With lower resolutions, text may seem bigger than normal the opposite effect happens when you increase the resolution. With images, a smaller resolution makes the image smaller and make the image hard to see but increasing the resolution on a natively small image can make the image look pixelated.