To activate your Drop, simply grab the Drop link and post it live. This can be in their story, bio, or website, and you can also send out a proactive message with the drop details to 1P opt-in fans you have in your Fanbase.
Once it is live, under Signups you can see fan signups in real time. Each sign-up Cobrand will display all required fields and any optional ones you added, plus the location and time of day when they signed up. If you are using a multi-link template, the farthest column will show what specific even they signed up for.
If the fan added their social profile, you will see a thumbnail indication and their number of followers. To learn more about the fan, hover over the row and click View Fan Details along the right side of the table.