The phrase "to add an incentive" means to provide a motivation or encouragement for someone to do something. It can be in the form of rewards, benefits, or advantages that will persuade them to take action or perform better at their tasks. The incentive could be financial, such as bonuses or raises, or non-financial, like recognition or career advancement opportunities. In essence, adding an incentive is a way of making something more appealing and attractive to someone by offering them something that they value.