To add a clickable link to your invitation, go to the About section of your invitation and paste the link into the Description box. Click Save & Continue. Your guests will be able to view and click the link from the invitation after it has been sent.
While Poply does not offer a dedicated polling feature, hosts can also post questions in the Description field when they are setting up their invites and request that guests answer by leaving a message for the host when they RSVP to the invite.