As an example, consider the interaction of Plerdy and Constant Contact
Our goal, in this case, is to add the contacts that we receive by subscription in the Plerdy pop-ups to the lists in Constant Contact.
First, we create a Plerdy account, in which we will create a zap
The detailed instruction is here
Choose Action Event – creating a contact in Constant Contact, every time we receive an email through pop Plerdy
Select the Constant Contact list to collect contacts from Plerdy, and fill the fields from which you would like to receive data to the list
After you turn on your zap, all subscribers from Plerdy`s pop-ups will be added to the Constant Contact list
Added contacts – Plerdy
and to Constant Contact