Web 2.0 is a set of technologies that enable "social computing" or "participative computing" in a number of forms.

BCNeS deploys Web 2.0 techniques like gathering collective intelligence and social collaboration to achieve market domination for its clients.

To understand this is to realize that the forces of change are intensely powerful in an online system (INTERNET) that now contains over 1 billion users.  No entity can possibly remain unaffected by sustained exposure to such a large system.  In other words, whatever is happening on the Web today will only have an increasingly pronounced effect on the enterprise.