A Mailchimp pop-up is a way to drive email subscription sign-ups (for those of you who use Mailchimp to send your emails, which is our recommendation). More about Mailchimp pop-ups here. You can see an example of the pop-up on our sample site (scroll down the page and it will appear).
After you’ve created a pop-up form in Mailchimp, click PUBLISH.
Click VIEW CODE, then copy the code.
Log in to your site’s admin area (e.g. https://yourdomain.com/admin).
Click SETTINGS.
Paste the Mailchimp code into the FOOTER SCRIPTS box.
Click UPDATE.
Refresh your site’s homepage in your browser, and check the pop-up form appears as you expect it to.