The four types of behaviour are the simplest division of the actions of people around us. By grouping people in this specific way, it is easier to understand their reasons for behaving in certain ways and making certain decisions. The yellow behaviour type is the optimist who can win over almost anyone with his open-mindedness and positive attitude. However, it is important to give it the right amount of attention and interest. It is also worth remembering to leave out unnecessary details, which easily bore yellows.