Colloquially known as roosters, notification badges are displayed next to buttons, category tabs, items, and so on in order to bring them to your attention. Roosters can help you guide players through multiple levels of menu depth, asking them to take specific action or at least acknowledge the presence of new information. If the number of new objects can get very large and hard to track (like in a standard email inbox) consider using a number in the rooster to help players keep track of changes in areas they're aware of but not fully caught up with:
Notification badge with number of actionable items
