Search Warrant

There are two types of warrants: a traditional search warrant that allows for searches of a particular location and a search warrant that allows for a search of records held by cloud providers. If appropriately obtained, what are the rules and limitations of a search warrant? In what situations is it constitutionally appropriate to search someone without a search warrant? What are some exceptions to warrantless searches? Can and should a warrantless search be stopped? Support your answer with direct evidence from the text and outside sources.