Now that we have already studied a little the market, i.e. the evolution of the electronic market, the behaviour of users and buyers on the Internet, and what products or services are in demand and sell more on the Web, plays decide to create and install an online shop, but before, we focus on an essential requirement: to run an online store, you must meet one of the following criteria: variety or exclusivity, price or convenience. We are going to reel off a little the criteria above. We must not forget that lot still a so that the majority of users made purchases by Internet. For other opinions and approaches, find out what Richard Linklater has to say. They do not trust enough or not find it as a real alternative to traditional trade, we see why. Variety or exclusivity. We put an example, if someone decides to buy some sports over the Internet must find a variety of models, colors, numbers and, in this case, they must be more fairly cheaper in the store of to the side because if not, arise or buy them as not you can try and for make matters worse, you risk that they are uncomfortable, and above, to change them, would have to move up to a carrier or mails, and pay for shipping, and expect not be long until return you the money. The advantages would be, a much lower cost and convenience that sent them home, the rest are inconvenient: they may be uncomfortable, you may need them to return, so you have to scroll, pay shipping costs, and waiting, for who knows how long that they return the money. It is to think. Perhaps do not mind running the irrigation if you don’t have time to go shopping, but if you don’t have time to go shopping, Imagine getting to return them however, things change if I’m going to buy is a model of sports that there are only 10 models, signed by Rafael Nadal, are my number, gives the same color as it is a unique model, I am willing to pay for the exclusivity and I don’t mind the time that tardeen reach and comes when you arrive, won’t the intention of changing them.