Badge
physical or digital insignia indicating membership, rank or accomplishment
A badge is a device, patch, or accoutrement which is given and/or can be displayed to indicate some feat of service. It can be for a special accomplishment, a symbol of authority granted by taking an oath (e.g., police and fire). It may also be a sign of legitimate employment or student status, or as a simple means of identification. They are also used in advertising and publicity.
Many badges are worn by soldiers on their uniforms, having been granted by their organization.
Others are used by political parties, government and non-government services and organizations, schools and many more.