Web $2\mathrm{.}0$

is designed to make users' web experience interactive and includes social media

refers to the earlier versions of the web $($before social media$)$ when the web was not interactive but more of an electronic bulletin board

is a major Internet cooperative initiative among academia, industry and govt to increase the capabilities of the Internet and to address some of its challenges

will be realized in the next few years with the Internet $2$ technologies applied$/$operational