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Paste the code to your Site123 website’s HTML field.
Next, go to your Site123 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 Site123’s editor. Add it to your page, and paste the Corner Coupon Pop-up Embed Code you’ve copied before to the HTML field.
Save and update, and that’s it, you should have Common Ninja’s Corner Coupon Pop-up app on your Site123 website.