The refresh rate is measured in hertz (Hz), and it dictates how often the frame can change. A refresh rate of 120 Hz allows a new frame to be displayed up to 120 times every second.

The refresh rate of a display — measured in Hertz (Hz) — indicates how many times per second the screen updates with a new image.

Refresh rate in a nutshell A refresh rate, measured in hertz (Hz), indicates how many times per second a display updates the image it shows.