The document discusses communities of practice (CoPs) and how they can utilize Web 2.0 tools to collaborate more effectively. It defines CoPs as groups that share a common interest or passion for something they do. CoPs allow members to exchange knowledge, best practices, and lessons learned for mutual benefit. However, CoPs face dangers like information overload or loss if not properly managed and facilitated through online collaboration tools. The document recommends using tools like social networks, document sharing, videos, and slideshows to connect members, share information, and attract new participants to help CoPs be more sustainable through increased collaboration.