1) Web 2.0 involves social tagging, user-generated content, credibility systems, participation, collaboration, trust, decentralization, and rich user experiences. 2) Twitter is a microblogging service that allows users to post short text updates and follow the updates of other users. 3) The document discusses how Twitter works and provides examples of how it can be used positively to find events, collaborate with others, and promote blogs and projects.

3. 3) Foundation on the user, credibility, page rank. example: Credit system of Ebay or the reviews of Amazon The most important example is the great number of the beta versions to wait for the feedback of the user. But also their visits and comments. 4) Participation example: blogs 5) collaborations example: wikipedia, wiki

4. 6) Trust example: Always wikipedia, needs large trust in fact to share the knowledge and to use it in this manner. Wikipedia is like a great expert for information of niche beyond those generalities (Long tail). 7) Decentralization example: peer to peer 8) Captivating experience of use (rich) example: gmail, google maps, podcast

6. 5) Open source Firefox, Joomla, Wordpress 6) Evolution of websites 7) Decentralization of authority (give the power to the user.) 8) Freedom to share and to reuse. 9) Global conversation: blogsphere, technorati, twitter! 10) Increase the economic value of the web. 12) Innovation of the web: ebay paypal, del.icio.us, skype, adsense

13. 3) For promoting events, conferences, party, etc. 4) For sharing ideas

14. 5) For launch a meme (a blog game) 6) Look for collaboration, support and suggestions

15. 7) To play with the words

16. 8) Share facts, citations, anecdotes. 9) For socializing

17. Twitter also can be used for direct messages Just write: D ELENA message you want to send

18. You still think it is useless? It has good intentions. Can only say what I do since I had Twitter: 1) I discovered the BarCamp 2) I found attractive blogs 3) I started a new working collaboration 4) I got into Second Life, because people on twitter was talking about it.. 5) I have unexpectedly found overseas vacation resources (translation: new friends abroad) 6) Can better promote events, announce and others. 7) Meet with all the twitterers in Bologna I would stop here. With good intentions, Twitter is not useless to me.