This simple statement got me thinking: What makes a “social network,” in the online sense? And, of course, the related question: Why does this word parsing matter, if at all?

To kick off my thinking on this issue, I informed my Twitter crew:

I’m intrigued by people who refer to things like Twitter as a social network. Is a blog a social network because it has your picture on it?

Sort of a snarky statement, but the responses, which came quick and often, turned me from silly to thoughtful. I had always reserved the label “social network” for those sites that centered on the profile, a quality Facebook, MySpace and many others certainly share. I considered Twitter and Pownce to publishing tools, not networking tools.

In response to my statement, Connie Crosby took the old-school approach, reminding me that social networks are indeed composed of people, not Web sites, but that Web sites — even blogs — can be effective social networking tools if people put an effort toward truly connecting and interacting.

Thu-An Bui also emphasized the idea of interaction. So did Julio Ojeda-Zapata, a technology writer at the St. Paul Pioneer Press and all-around geek (in the best way possible). And so did Clarence. Cece Salomon-Lee did, too, and added an angle about being able to “interconnect [with other people] seamlessly – add, delete, block, follow, etc.“

I think you see the trend developing here.

Social networking is about the people. Sites like Facebook are definitely focused on profile pages and connecting with other people, which led me to my initial, narrower definition of “social network” — something like a fancy, interactive Rolodex. Sites like Twitter, which the people mentioned above solidly regard as a social network, are more focused on communicating, I’d argue, than connecting people, but those two ideas are so closely connected I wonder if the distinction is relevant.

Why does any of this matter? I still wrestle with that. Maybe you can help (see that comment form below?). But one thing I do know: You can do yourself a favor by not getting caught up in your own preconceptions (or in this case, misconceptions). The way people use a Twitter, or a Facebook, or an anything, matters more than the label or even the purpose anyone tries to force upon it.