A keynote feedback survey asks the audience about the talk that opened or closed your event, the one most attendees saw. This template takes under a minute: a rating for the keynote, a rating for the speaker, a check on the length and one takeaway in their own words.
It is written for a QR code on the closing slide, scanned as the applause ends and answered on attendees' phones before they leave the hall. The same link also works in a message from your event app, in the stream chat for remote viewers or under the recording, and the template can run as a popup on the keynote page of your event website.
Every takeaway is read as it arrives and given a theme and a sentiment, so you can see which ideas stuck. Results shows the keynote and speaker averages with the share who rated 4 or higher, and the split between too long, about right and too short.