This article explains how to reboot a router and modem. It includes information about the types of problems a reboot can fix, and the difference between a restart (or reboot) and a reset.
Reboot your router and modem if you suspect your network isn’t working properly. Maybe web pages aren’t loading, Netflix freezes halfway through a movie, or your smart speakers suddenly stop playing music.
Rebooting the router gives it time to cool down and clear its memory.
Unplug the router and modem. If you have other managed network hardware, such as network switches, unplug that hardware. Unmanaged devices can be left powered on, but use your own judgment if you think they may be part of the problem.