BJ Fogg, a professor of human behavior from Stanford, created a model that boils down all behavior into three factors: motivation, ability, and a trigger281. Motivation is how much the individual wants to take the action or obtain the desired outcome. Ability is how equipped the individual is in taking that action; in other words, how easy or convenient it is for the user to perform the action. The third factor is a Trigger, or something that reminds the user to take action.