Where can I use GivePanel's event registration form?

For the event registration form type in GivePanel you get a single URL (link) that you can use anywhere you like (facebook groups, emails, facebook posts etc). 

Here is how you create one.

The Fundraiser Details form type in GivePanel has a different URL (link) for every fundraiser and therefore should only be used in message templates that are posted on the Fundraiser's Facebook Page.