Are your employees happy? How happy are they? Does happiness really matter? It is well said that when people are monetarily capitalized, they want a return, and when people are emotionally devoted, they want to contribute. In organisations, emotions are imperative. Emotions, whether positive or negative, drive our behaviour, especially at the workplace where the contribution of each employee is an asset to the organisation. So, the query arises, Can organisations employ positive emotional contagion to change the behaviour of individuals to do what they want? This chapter emphasizes a new ground that happiness is having critical importance in today's parlance to both employees and employers. This chapter presents a snapshot of various definitions, theories, findings of various studies, causes, and consequences of happiness and unhappiness in the organisation and how the happiness can be nurtured or improved at the workplace.