The microblogging is composed of very concise and synthetic messages. In the manner of an SMS , the message is clear, direct and informative. On Twitter , members are accustomed to this form of communication. As such, each tweet is often composed of a message of a few words, a few hashtags (topics treated by the tweet) and a link to the information mentioned. The microblogging is a powerful lever in terms of web marketing . Brands and companies can spread commercial messages and develop a real viral marketing strategy . Games, competitions and actions of crowd funding can be organized through microblogging .