You want to get feedback, over time, on a recent webinar that was presented. You also want to send a special marketing email to those attendees who meet specific criteria. To do this, you capture this information in the landing page by using a progressive web form.
On return visits to the website, progressive forms ask recipients/visitors for additional information to get data for the fields not already captured. Over time, you can progressively build a comprehensive profile of data with less risk of abandonment or fallout. Using this information, you can then add these attendees to a email list and send a email to the contacts in this list.