You can post a poll on Mastodon by clicking the 📊 bar chart icon when you're creating a post, then adding options.
If you're using the web interface or a third party app, you can set the poll to allow multiple responses or just single responses. The web interface also allows poll durations to be as short as 5 minutes.
⚠️ You can edit polls, but if you edit a poll's options the votes get reset to zero.
Lots more info about Mastodon polls at:
