Adding a submission content field for entering a phone number along with the email address to the Promotional Pop in Version 7.1

I was wondering how someone did this and it has already been done on this Squarespace website. 
How was this done? Can someone share with me how to do this?

What website is this on? What are you hoping to replicate, the phone number on a marketing popup?

On 4/5/2024 at 1:27 AM, Ziggy said:

What website is this on? What are you hoping to replicate, the phone number on a marketing popup?

Hi, thank you for responding.
Yes, and store it for later use and retrieval. 
 

https://www.wasiofaces.com/