The Aadhaar Card is a unique identification card issued by the Unique Identification Authority of India (UIDAI), which is a part of the Government of India. It is a 12-digit number that is linked to an individual’s biometric and demographic information such as name, address, date of birth, fingerprints, iris scan, and photograph. Aadhaar is used to verify the identity of residents of India for a range of services and benefits, including government schemes, banking services, and subsidies.