On the food label for a package of crackers, what does a 15 percent daily value for iron mean?

A 15% percent daily value for iron means that one serving of the cracker provides 15 percent of the iron that the average person needs each day.

The Daily Value or the DVs for short is an indicator that shows information about the nutrient that can be provided in one serving of the food for an average person. The average person is a healthy adult who consumes exactly 2000 calories a day which became an indicator basis for The Daily Value.