The video discusses three major categories of assessment in sales: will to sell or grit, sales DNA, and tactical selling competencies. Will to sell cannot be trained and is about the individual's determination and passion. Sales DNA consists of strengths that support various aspects of sales and can only be improved through coaching. The third category includes ten tactical selling competencies such as hunting, reaching decision makers, and selling value. These categories are crucial for evaluating and improving sales performance. #vizard
