Metcalfe's law says that the more people use something, the more valuable it becomes.

Collaboration tools or software is designed to help individuals become involved in a common task or project to achieve their goals. Email, calendaring, messaging, videoconferencing, blogging, sharing documents and files all form part of the collaborative solution set. Collaborative tools promote team work, sharing and communcation.

With an increasing volume of users spread over a number of sites or offices, working from home or a remote customer site, collaborative tools provide efficient means to complete tasks or communicate with colleagues and peers.