Communication is one of the most important aspects of life. We communicate all the time, even if we don't realize it. We communicate with our words but we also communicate with our facial expressions and body movements. It is actually very natural for us to communicate without even using words. We shrug our shoulders to say, "I don't know" and roll our eyes to show were annoyed by something. We wave hello and goodbye as a common greeting and smile to show someone we're happy.