It is very important to have understand of psychology to generate sales in your business. You need to understand the market psychology and customers’ psychology to understand the market condition and the customers’ demand. You need to understand the mindset of your buyers. You should know what they want and how much they're willing to pay for it. Once you understand the psychology of your buyers, you will also understand their behaviors and attitudes. When yu understand this, you can connect with then in a personal level.. How you interact with your customers is just as important as what you're selling.