How many questions should the FAQ hold?
Six to ten is a comfortable size for most events: enough that the recurring questions are covered, short enough that reading it costs a minute rather than a lunch break. If the list grows past that, some answers probably belong in their own sections, like directions or the dress note.
Where does the FAQ sit on the invitation page?
After the main details, alongside the schedule and the reply button, where guests reach it without hunting. Its position matters far less than its existence; guests arrive at it from the same link as everything else on the invitation.
Can I answer different questions for different guests?
The page shows one set of answers to everyone who opens it. If a question is genuinely for a smaller circle, like the details of a surprise, send that in a private message or move those answers onto a password-protected page.
Should I include questions nobody has asked yet?
Only when you know the answer will matter on the day: the rain plan, step-free access, how long the speeches run. Guessing at questions produces pages that read like instruction manuals, so keep the list to what guests genuinely need to know.
Can I change answers after people start replying?
Yes, and that is part of the point. The page is live, so a corrected answer is what the next guest reads. Nobody needs anything resent, and your reply list stays exactly as it was while you edit.