Emotion regulation is the conscious and unconscious efforts people make to increase, maintain or decrease their emotions and is manifested by changes in facial expression and by changes in vocal and body signals. People often regulate their emotions at work. An example of emotion suppression is when a worker tries to hide anger they might be feeling towards a colleague or manager. Emotion amplification on the other hand, is when one pretends to be happier than one actually is. For example, an insurance or telephone salesperson may amplify their display of positive emotion to customers in order to increase their level of sales and quality of service.