When employees are engaged they get a personal sense of fulfillment from achieving objectives and / or doing their work well. It can be anything from “winning”, to being seen as valuable, to feeling pride in mastering a project or pulling a team together to accomplish something exciting. External incentives and consequences such as: winning trips, getting monetary bonuses, or getting scolded for not achieving an objective, all influence behavior to a degree, but when the desire comes from within, there is an unlimited supply of energy driving success.