A badge is a device or accessory used to indicate some feat of service, a special accomplishment, a symbol of authority, or membership in a society or group. It can be made from various materials such as metal, plastic, leather, textile, or rubber, and is commonly attached to clothing, bags, footwear, vehicles, and home electrical equipment. Badges can also be used in advertising, publicity, and for branding purposes. In the military, badges are used to denote the unit or arm to which the wearer belongs, as well as qualifications received through military training and rank. In computing, badges are used to demonstrate skills, and in education, digital badges are used as alternative forms of recognition
. In the context of mobile applications, app icon badges are a subtle engagement tool that indicates there is something important, interesting, or stimulating to see if the app is launched. They are typically a little red dot with a number printed in white text, indicating the number of notifications or messages waiting for the user when they open the app. App icon badges are used to remind users to engage with the app and are best used under specific circumstances and by certain types of apps
