A lot of good design is almost invisible. You only notice it when it doesn’t work. This is particularly true in the design of information. Not thinking about where a roadsign should go, or drawing a map that doesn’t have enough detail will result in people getting lost. Which is never a nice feeling.
The ingredients on a tin of peas, or the display in the car that tells you how much petrol is in the tank. Designing information is about delivering important facts as clearly as possible. While you might have never noticed it before, once you start looking you’ll see that it’s everywhere.