If you successfully installed a Popup to your web page and you're unable to see it, make sure to double-check your Popup Display Options.
If your Popup frequency is set to any option other than "Every Time Anyone Visits", it's very possible that you've triggered the Popup yourself, and won't show for you again until the specified interval.
To double check this, open the link to your webpage in an Incognito Window. Since an Incognito Window is clear of cookies, you should be able to see your Popup as if you were a brand new website visitor. If your Popup still isn't showing up, contact the Support team for more help!