Navigate to BigCommerce Admin Dashboard
Click "Storefront"

Add a "Script name" -  "Emotive Popup Script"

Click "All pages 
Includes storefront pages, checkout, order confirmation and cart page."

All pages 
Includes storefront pages, checkout, order confirmation and cart page.

Copy the code snippet from Emotive into the Script contents section

Click "COPY" from Emotive for the code snipped to copy into BigCommerce

Here's a guide to setup an Emotive Popup, to get the code snippet: <https://scribehow.com/shared/Create_A_Signup_Form_in_Emotive_App__4HMcjBD7SsGWS7Q-xRN-iA>

Install Emotive Popup on BigCommerce