The refresh rate is the number of times a monitor refreshes the image on the screen. Simply put – a higher refresh rate equals a smoother image. This can make your game look and feel more responsive, so if it’s the competitive edge you’re looking for, you’re going to want a gaming monitor with a higher refresh rate.
Most monitors will support either a 60hz, 120hz, 144hz, or 240hz refresh rate. Although these numbers may seem high, it still comes down to how fast the human eye can process the image being displayed. The difference between 60 Hz – 144 Hz is very apparent – however, once you get above this, it’s quite difficult to detect the difference with the naked eye.