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Paste the code to your Instamojo website’s HTML field.
Next, go to your Instamojo store 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 Instamojo’s editor. Add it to your page, and paste the Popup Builder Embed Code you’ve copied before to the HTML field.
Save and update, and that’s it, you should have Common Ninja’s Popup Builder widget on your Instamojo store.