In the Wolfram Language I can usually guess a function's name, operation or idiomatic application but I don't have such a sense for various Entities ...

... instead, I seem to keep needing to consult the documentation. This suggests I'm yet to appreciate an underlying, organizing principle or abstraction; to grok it in ways that allow better evaluations of WDF's applicability. So is there a nice example/holistic way of conceptualizing/visualizing this framework?