Accurate timekeeping is one of the most important configurations required for reliable communication between network-based computers. It is also needed to ensure system components, including systemd timers and cronjobs, run at the correct time. Computers can utilize the Network Time Protocol (NTP) to synchronize their time to an upstream time server or a pool of servers to maintain accurate time.

Source: LXer – How to configure chrony as an NTP client or server in Linux