Documentation:Social Web Tools/What are Social Web Tools
What is it?
Social Web tools or technologies are those that make it possible, even easy, to collaborate, share, participate, communicate, and form and re-form relationships along the path of learning.
There is a match between what are seen as 21st-century learning skills, 21st-century employability skills and those engendered by engagement with Web 2.0 – communication, participation, networking, sharing. 
Cooltoolsforschools: a compendium of web resources suitable for use in educational environments.