Why my bar is not showing up?
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
The announcement bars you create are inserted into your current theme only. If you decide to change your theme, announcement bars created before won't show up on your new theme.
To copy your bars to the new theme, all you need to do is to pause then resume your bars using the app's dashboard while your new theme is active (published)
You have a missing </head> tag
If you have accidentally removed the "</head>" tag from your theme, your announcement bar might not show up.
Please go into your "theme.liquid" file and ensure you have "</head>" tag.