Since last year it emerged that Twitter was considering entering the business of electronic commerce as one of the models to generate new revenue. These days are released from different sources the first foray into the sale of products of various kinds. The idea is borrowed from private sales sites and of limited duration, such as Gilt, Groupon and Woot (which was recently acquired by Amazon.com), a recent trend in online shopping. It also takes advantage of what companies like Dell, which is attributed million dollars in sales for publishing deals on Twitter. Offers may be in products like the iPod or diapers, or at events such as concert tickets or trips. In a post on a company blog, Twitter hinted that it could filter offers by category, such as clothing or accessories, in the future. Twitter has stressed he wants to be selective to the tender offer and "try to make these offers interesting and valuable to Internet users." Retailers determine the price of items and their availability. Twitter will make money from sales. It is experimenting with different models, such as a cut of each sale or a fixed price for operation, said Sean Garrett, a spokesman for Twitter. Traders use the numbers of the credit cards of buyers for the respective transaction for the product purchased. This is a different approach to electronic commerce in which retailers can offer online transaction on the basis of what people are looking for. A retailer of running shoes, for example, may offer the shoes to people who asked about the best shoes for running on trails. This may still be possible with annotations, a new Twitter service that says it is launching soon so people can add data called what they want, as a way to make a purchase, in positions of Twitter. The first agreement will be published soon, said Mr. Garrett. At first it will be throughout the U.S., but Twitter is considering further specific offers for other countries. Your website could also be seen as often as this article.