How often will my Banner show up for users?
Banners are a persistent experience that will continue to show unless your users dismiss it if the ‘Dismiss behavior’ option is enabled in the Builder. Once a Banner is dismissed, it stays dismissed and does not come back.

How can I add an emoji to a banner?
Banners do not have a separate emoji block but emoji can be added to an existing or a new text block. 
Access the emoji keyboard on your device:
Windows - press the Windows key + . (Windows reference)
Mac - press Control + Command + Space (Apple reference)
 

Is there a maximum character limit for text in banners?
While Banners do not technically have a character limit, we recommend being mindful when crafting your Banner experiences. The most effective Banners will typically include concise information or a simple call to action for your customers.
 

Are Localization/Translation options available for Banners?
Localization for Banners is now in Beta! If you are interested in this feature, please refer to this article.