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Paste the code to your Drupal website’s HTML field.
Next, go to your Drupal website editor and find the HTML field. It is most likely in the form of an HTML/Code widget or module which you can find on the Drupal’s editor. Add it to your page, and paste the Catalog Embed Code you’ve copied before to the HTML field.
Save and update, and that’s it, you should have Common Ninja’s Catalog app on your Drupal website.