In looking at the FAQ's for other Stack Exchange sites (bicycles, StackOverflow, cooking) the convention seems to be that SE sites include their "elevator pitch/tagline" at the very top of the FAQ. So the question is what is our elevator pitch?
From 7 essential meta questions about a site's "elevator pitch":
Imagine you’ve just gotten on an elevator with a friendly stranger. You have precisely one floor to describe this community to them. What would you say? The elevator pitch is a brief sentence that describes what this site is about. Every word counts!
Once decided, it can be sliced and diced to form:
- the tagline
- the motto
- the blurb under the logo
- a convenience redirect “nickname” for the site
For more detail see: Stack Exchange Naming for Dummies