How to install NotiPack with OpenCart?

Go to "System", next Custom Javascript

and Paste your Notipack pixel code.

Where can I find the pixel code?

Click the </> tag in the installation section - a window will appear, copy the pixel code assigned to your domain.

This is incomplete integration

If you want to send collected emails to your email system and display "Latest conversion" and "Conversion Counter" popups, you need to use Zapier.com / Make.com for this. More: Webhooks - How to use them?