So what does a server control do/what happens to a server control, AFTER its instantiation, but BEFORE loading View State?

Question

My understanding of the page life cycle: An aspx page's constructor calls all server controls' constructors, thereby creating a Page object as well as all server control objects(Instantiation)-->Page_PreInit-->ServerControl.Init()-->Page.Init-->Page.InitComplete-->Laoding View State. However I'm not sure much action happens to server controls during this whole time.