You can use it at home, of course, but it really comes into its own when you are in another member state, where you can simply dial 112 to call the police, an ambulance, or report a traffic accident - you don't need to know the national number.
Zvanot pa 112, jebkurā ES dalībvalstī jūs savienos ar vajadzīgo neatliekamās palīdzības dienestu — ar ātro medicīnisko palīdzību, policiju vai ugunsdzēsēju brigādi.