New Delhi, Nov. 13 -- You spend hours looking at your monitor screen, so it makes sense to pick one that looks good and feels comfortable to use. But when you see terms like Full HD, QHD and 4K, it's easy to wonder what difference those really make. The truth is, resolution affects more than just how sharp your games and movies look. It changes how much you can fit on your screen, how fast your system runs, and how tired your eyes feel after long hours.

A monitor's resolution tells you how many pixels it has across and down the screen. Full HD, or 1080p, gives you 1920 x 1080 pixels. QHD, also known as 1440p, packs in 2560 x 1440 pixels. And 4K, sometimes called Ultra HD, boasts 3840 x 2160 pixels. More pixels mean clearer images and smo...