This is from the 7 essential meta questions and is related to Rob Stevenson-Leggett's question What should the FAQ Contain?.
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