Rebooting a modem helps to clear out the modems memory and helps speed up the internet connection.
Rebooting your modem helps to refresh the modems settings and can fix some internet connectivity problems.
Power Cycling or rebooting your modem fixes a number of internet connection problems, improves some slow connections and resolves wireless issues.
It's a good idea to power cycle or reboot your internet modem at least once per month to help refresh it.
Just like rebooting a computer helps to clear the memory and speed up the computer the rebooting of the modem is also a good thing.
Sometimes when you're experiencing internet connection problems or cannot connect to the internet rebooting the modem can help.
Or if your device won't connect to the WiFi then rebooting the modem can also help fix that connection.