If you browse through the scope tag here on meta, you'll see that our scope might not be entirely obvious from the site title. When we open to the public, though, it's really important that we can quickly summarize our scope. Not everybody will have the patience to go through all our meta discussions before posting. Therefore, I think we should try to boil our consensuses down into a sentence or so, suitable for putting on the "sign up" banner.
For example, here's Super User's, emphasis mine:
Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute
Programmers Stack Exchange is a question and answer site for professional programmers interested in conceptual questions about software development. Join them; it only takes a minute
Data Science Stack Exchange is a question and answer site for Data science professionals, Machine Learning specialists, and those interested in learning more about the field. Join them; it only takes a minute
What should we have in that spot? As mentioned by wythagoras, we do have a default already in the tour, but do we need to adjust it after our meta deliberations?
(This is the fourth real essential meta question for private beta sites.)