Marketing and selling are two very different concept, although they have some similarities but they are different. Marketing has to do with taking your product or services out to convince people to either buy your product or to patronize your service while selling has to do with making sales. You don't have to leave your shop or your business to sell, you can just be in your shop and be making sales without going out but marketing is not so, you have to go out to convince people to buy your product or services.