The app is not showing on my website
Your page is probably cached
Browsers tend to cache pages for faster loading. Therefore, changes to your page doesn't usually happen instantly, and your browser keeps showing you an older version of your website.
To see a live version of your website, you can clear your browser cache or use a private browser window to visit your website.
You have changed your theme
When you install the app, the widget is inserted into your current theme only. If you decide to change your theme, the widget won't show up on your new theme.
To fix this, all you need to do is to disable then enable your widget using the app's dashboard while you new theme is active (published).