The ConvertForms Assignment lets you display your box to those who have subscribed to one or more ConvertForm Campaigns exclusively. Take a look at ConvertForms if you aren't aware of its insane potential converting visitors into subscribers.
In the table below you can see which options are available to setup the ConvertForms Assignment.
Click in the textfield so a selectbox pops up from which you can filter the ConvertForm Campaigns that you'd like by typing on the fly.
Once you select one you can continue typing to find the next one and so forth.
A common use case is for the ConvertForms Assignment is when you want to exclude visitors and users who have already subscribed to your ConvertForms Campaign from trying to be subscribed again.
The detection of whether a user has subscibed works for both logged in users and normal visitors through cookie detection.