Most people, when they ask about something, they want to know just enough to get by. They don't want Ph.D. level mastery on how to read maps, time traffic lights, optimize gas mileage and track coupons. They just want to get to the store, get their stuff, and go home.
It took me a while to learn that when someone asked me to explain something, they didn't want to know absolutely everything about it (And I would think, "Well, why wouldn't everyone want to know every last detail about something?")
I have to continually work at shortening explanations, stories, etc. When I was young, my mother once said, "Rex doesn't do anything halfway." Time and again, I realize how true that is.