FAQs are a good fit for game manuals, where often layers of rules have strange interactions which make a FAQ to settle a few rule questions or "gotchas" importa

FAQs are a good fit for game manuals, where often layers of rules have strange interactions which make a FAQ to settle a few rule questions or "gotchas" important and interesting. But FAQs for a web application I think is a bad fit, it is generally more useful to have a forum (so you can get real feedback on what is frequently asked) where common questions will bubble to the top more often. Or if you're big enough, a stackexchange which handles genuinely frequently asked questions better still.