You’ll need to open your website under the web domain. The app will not work in preview or development modes.
After you install the script on your site, go to Offerbox dashboard and click "Configure" in the navigation menu.
Find Website settings and add your custom domain
Your website domain must match the value here. Most websites these days use multiple domains. At a minimum, you have a domain with "www" and also a root domain as shown below.
Therefore it is important to configure a primary domain for your website and add redirects to the primary domain. Offerbox only accepts a single domain. In case users visit your site with other domains and there are no redirects to primary domain, Offerbox will not be visible to the user.
In Shopify, you can configure your primary domain under Online Store > Domains