How to use the floating button
With the Floating Button your users can sign up from any page of your website, thus increasing the likelihood that they will sign up and invite their friends. For you, it also means that you don't need to create a dedicated landing page for your referral program.
This is how the Floating button looks:
How to enable the Floating Button
To enable the Floating Button, go to your campaign dashboard, click "Edit campaign", go to the "Widget" page and click on the third tab "Global options".
From there you can customize the colour
To avoid conflicts, the Floating Button only works on pages where you DO NOT use the sign-up form. In other words, you can't have the form and the Floating Button on the same page and if you do the form will be given precedence.
Because of this, the Floating Button works only with the popup, which means that you must use the popup for the sharing screen.