Answer:
With the use of data and their types the extent of how much data can be stored can get insanely large. types like doubles and longs allow for a range of values nearly incomprehensible in their size for storing user information, web pages, games ect. Using them essentially allows you to plan for the future of the size of whatever you're creating. On top of that, it allows for a preciseness not typically able to be reached without these types.
