Happiness is a subjective and complex emotion that is difficult to define precisely, as it can vary from person to person. However, happiness generally refers to a state of well-being, contentment, and satisfaction. It is often characterized by positive emotions, such as joy, pleasure, and fulfillment. 

It's important to note that happiness is not a constant state but rather a fluctuating and dynamic experience. People may experience happiness differently based on their individual values, cultural backgrounds, and life circumstances. What brings happiness to one person may not necessarily have the same effect on another. 

Ultimately, happiness is a deeply personal and subjective experience, and each individual may have their own unique definition and understanding of what it means to be happy.  

Topics covered include: 1) Definition of Happiness, 2) Deriving & Cultivating Happiness, 3) The Brain and Happiness, 4) Neurotransmitters & Natural Chemicals, 5) Positive Psychology, 6) Happiness and Money, 7) Unhappiness vs. Depression, 8) Happiness and Social Connections, 9) Traits of Happy People, and 10) Happiness Apps.