At first I thought Quick Answers and Instant Answers were the same thing. But there are two different toggles for them:
There is documentation for Quick Answers, but I couldn't find any for Instant Answers.
It doesn't help that I don't know how to trigger an Instant Answer because the example query doesn't work for me.
Related, it would be nice if the settings page helped with discovering what the features are (either by putting more of a description in there, or by linking to documentation).
(I didn't know which tag to pick. There's no documentation tag!)