Happiness is about making the most of good times and managing the bad times too. It is said that success is the key to happiness, but research shows happiness could be the key to success. Happiness also brings great benefits for society, as research shows happy people have better overall health and are more likely to participate in public activities. In recent decades, one of the biggest social challenges is mental illness because society has become richer but not happier.  Happiness is what we want most for the people we love the most, it matters very much because it helps people live better lives and make society healthy and connected.