The research paper search demonstrate how web 2.0’ tools can operate in the libraries
helping the patron’s care process and promoting improvements in the services of the reference sector. Through a literature review are presented the main tools and features, identified examples of their application in information units, introduce aspects about the appearance of the internet and web 2.0. Also presents the historic of the main functionalities and concepts of the tools such as: Google, YouTube, Wikipedia, Flickr, Delicious, Twitter, Blogs, RSS Feed and Facebook. After the conceptual analysis of these tools begins to study focused in the patron’s care and compares the libraries
generations (library 1.0 x library 2.0). Then presented examples of how these tools can
be utilized in libraries, especially in the reference sector. It is concluded that the
importance of the adoption of these tools in information centers, the value, the lack of
initiative by Brazilian’s libraries, the fast advance and developing of foreign information
units main the Americans ones in relation to application of the web 2.0 tools is a fact that
must be considered by information professionals as main point of the evolution process of libraries in a future soon.