It's a known fact that people like to associate with other people of similar interests. Joining a social network site like Google+ and showing others that you've joined--by placing a Plus One button on your business' website, for example--can be the boost that solopreneurs and freelancers need to help build a strong customer base.
It's the concept of networking, taken to a different level. By maintaining a blog or website that has to do with some aspect of your business, you attract readers who perhaps have a similar interest. Or, perhaps they are seeking assistance or instruction on the topics you are writing about. If