What does it mean when it says restart camera?
Restarting the camera via the app or a rule is a “soft restart”. It’s hard to know exactly what’s going on in there, but it’s most likely rebooting its internal computer, or at least restarting some tasks and other things.
Note that this will almost never resolve network related issues, as the camera needs to be connected to the internet to receive the restart command. If your camera is acting up, unplugging and plugging it back in is always a better option.