The FPS, or frames per second, is a measurement of how many times the computer is able to render the 3D graphics image on the screen in any given second. The more frames rendered in a second, the smoother the perceived performance. The most important number is the average FPS, as it gives a solid number for the expected overall experience. 

In general, a frame rate of 30FPS is the minimally acceptable rate to avoid noticeable frame rate jitters. To achieve the best experience, it is best to meet or exceed the "refresh rate" of your display. For standard desktop monitors, this refresh rate is 60hz (meaning it refreshes its image 60 times in a second). In this situation, running at or above 60 FPS will give you the best experience possible. If you have a higher refresh rate monitor, than you can take advantage of the smooth game play of the games that are running well above 60FPS. 

For any game on our testing results which shows 60FPS or 120FPS across the board, this means the publishers made a decision to cap the frame rate for one reason or another. Most often, it is to maintain consistent competitive performance for cross play competition between various consoles and PC. Most often, these are in the fighting game genre.