Surge suppressors protect against catastrophic transient events like lightning strikes. They protect hardware, but not necessarily data. In order for them to work properly, surge protectors require a correctly wired and grounded outlet. They are not designed to save energy. Also be aware that some surge suppressors will continue to let power through, even after circuits have been damaged, exposing your equipment to other damaging surges.
Voltage regulators solve chronic high or low voltage problems.
In effect, they smooth out the surges or sags of the input power. They will not stop transients, nor provide outage protection. Standby power units supply limited back up power to small electronic loads. But their switching time may not be compatible with all electronic equipment. You may get an unfavorable reaction by a computer that interprets a period of zero voltage lasting only 120th of a second as a power outage.