The Aadhaar Card is a unique identification document issued by the Government of India. It contains a 12-digit unique identification number linked to an individual's biometric and demographic data. The card serves as proof of identity and address, making it essential for accessing various services, including banking, government benefits, and mobile connections. Introduced in 2009, the Aadhaar system aims to streamline service delivery and reduce fraud. It is managed by the Unique Identification Authority of India (UIDAI). The card is voluntary but increasingly required for many official processes, enhancing transparency and efficiency in public services.