Paste the code to your Website X5 website’s HTML field.
Next, go to your Website X5 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 Website X5’s editor. Add it to your page, and paste the What's New Popup Embed Code you’ve copied before to the HTML field.
Save and update, and that’s it, you should have Common Ninja’s What's New Popup widget on your Website X5 website.