Iconography is the most universal language in the world.  It is the one language that everyone can understand, regardless of nationality, race, age, or gender.  One small icon has the power to not only contain needed information but also deliver it immediately.  They are important in today's world because they are global.  They are inclusive and represent any group or situation.  In short, iconography is the essential language everyone understands.  I'm sure every traveler will agree they are important, especially when looking for a restroom at an airport. 

The following icons represent the best in design because of their precise design work, style, and effectiveness.