What does badge app icon on or off mean?

Determines if that app will display a marker on its icon if it has a notification for you

The "1" over Mail in the photo below a "badge app icon".

Thx! It clears up my doubts!

Thanks for the precise explanation ! A picture tells a thousand word 🙂

Thanks for the explanation. I can only think of 3-400 alternate names that would have been more self-explanatory. iPhone's whole notification system is one of the least intuitive I have seen.

/rant

Now a days, common way to notify.

Badge icon with number notice about whats new updates, New notification are still present that you miss. So user can get it withouht any of miss.

Thanks.

Thank you. Very NOT intuitive. Badge App Icon? What's a badge. A hint in the Settings would be helpful. Who would ever know this terminology?

Lol