You're talking to a fellow Raspberry Pi enthusiast, a stranger, or even a member of the Raspberry Pi foundation. What is a brief description for the site?
A community-based question and answer site for users, developers, and researchers of Raspberry Pi.
There would be plenty of people who may not really know what a Raspberry Pi is, even if they've heard it mentioned. "Miniature computer" might be a good elevator description of it that's worth mentioning in there somewhere.
A question-and-answer website for enthusiasts on how to use a Raspberry Pi miniature computer.