With the advent of the internet, the rules of the marketing play have drastically changed: banner, advertise, links, social media are reducing to a well-defined place. At first companies used to promote themselves using printed paper, but suddenly they could advertise on the net. Nowadays almost everyone has a domain, where to expose a message, a proposal. What is the real purpose of a website? Despite what people think, there are several reasons why to have a website: 1) Advertising; 2) Maintenance of long relationships with clients; 3) Assertion on the competitor.