Adding in a Website Link from a different website into an Event Form in a Field's Description
While there are currently no specific question types that allow you to enter in a link to another website, you can add in a link to another site as part of an existing question's instructions section.
You can insert a link to a website into the instructions section of any question field (as long as it is not a table or matrix field)
Open the event form builder and open up a field that you want to include the hyperlink underneath. Then, type in the link as part of html code shown here
The formatting is as follows:
<a href="http://the.site.you.are.linking.to.com" target="_blank">The name of the link</a>
e.g. <a href="https://my.smartabase.com/fusionforms/"target="_blank">Fusion site</a>
The link you have written will be displayed as the name you included after the "target"=_blank" , e.g as Fusion site or any other text you include (as shown below).