Through conversations with industralists and directors I could have been detecting a series of false beliefs on electronic marketing that, perhaps, they would explain this delay in its implantation. First and, with respect to the small and medium companies, most important, it is than the majority thinks that the subject of Internet and and-marketing is thing of great companies that, according to them, are the unique ones who can plan in the half term and destine resources to this ambito. Nothing else far from the reality, since indeed they are the Pymes those that better can take advantage of the strategies digital marketing to obtain objectives that before yes that was limited the great companies, and to compete with them in equality of conditions. In Catalunya there are approximately 525,000 companies, of which 34,500 are Pymes (neither micro nor great). These companies are those that have the greater opportunities to expand their markets, to catch new clients and to fortify the relations with the present ones through marketing in Internet. Specially those Pymes with exporting and international vocation, for which marketing in Internet is formed already like an essential element. And it they can make because the resources that now there are to destine to obtain these objectives yes that they are to its reach. We do not lose this opportunity by ignorance or false beliefs.