Many people confuse authorization and authentication – and given that
the two are often paired together that is not surprising. If you had to
explain the difference to someone unfamiliar with the concepts what
would you say? If you explain things in a visual manner pretend you do
not have access to PowerPoint but have been given a whiteboard and some
markers. Feel free to include the sort of diagram you would find helpful
in your explanation. Ultimately, remember that “why should I care?” is
the question you really need to answer.