Using twitter for microblogging, for example, is an effective means of making a companies institutional identity more personal. Sharing information quickly to potential clients, as well as broadening the scope to an international audience are some of the other advantages.
Google uses a mechanism which prioritizes content that is both recent and relevant, thus blog writing is also amenable to receiving better search rankings.
The report also shows that one tool should not be used in isolation, and that it is important to utilize several of the popular mediums for social networking.