Let’s say you are selling freelancing services, a lot of people are selling the same service that you are selling. Therefore, customers have multiple options available, they are free to choose their own seller, they are not under any compulsion to buy from you. If you want to sell, you need a power of persuasion, you need to persuade your customers. How do you do that? The most important thing is to make them believe that you are offering the best product for the best price and none of your competitors are as good as you are. You need to convince them with your product.