Hz
(Hertz)
The unit of frequency measurement equal to one cycle per second. Abbreviated Hz and named after Heinrich R. Hertz.
In phones, this often is used to measure how often a display refreshes the images it displays. Although 30 Hz is often fast enough for most situations, 60 Hz can look smoother, and even faster Hz can provide a noticeable benefit when displaying content with very fast motion, such as fast-paced games.
