What is library 2.0?

The Web 2.0 extended to libraries has been called Library 2.0, which has ramifications for how librarians will interact and relate to persons who were born digital, especially related to teaching and learning, and planning future library services and facilities.

http://www.ala.org/tools/atoz/library-20

https://www.igi-global.com/dictionary/social-software-use-public-libraries/17099