The action you see on your screen is a series of frames strung together, like a movie. Refresh rate refers to how many times per second the display updates or “refreshes” the image it shows. The refresh rate is measured in hertz (Hz), which stands for cycles per second.
A higher display refresh rate shows more frames per second, making the action smoother and more responsive. This uses more battery power.
To raise or lower the refresh rate:
Adjust the rate: