Our interaction campaigns can collect any attribute sent along with the email address. While only email is required, the others will be retrieved from the html and passed along with the submit event.
In our article on Interaction template format, there is one section called Adding multiple attributes to form.
You’ll find there how to add new attributes when you collect their email address, which need to be previously added to Users -> Attributes section
Tags attribute has a bit different usage, as it can keep multiple values at the same time.