Want to change your Aadhaar card photo online within minutes? Here's step-by-step guide Aadhaar card contains your demographic as well as biometric data, including name, address, contact details, photo, and biometric details. DNA Web Team Jan 23, 2021, 12:43 PM IST There is no denying the fact that Aadhaar card has now become one of the most of imporatnt identification documents in India. The 12-digit unique identification number is issued by Unique Identification Authority of India (UIDAI). Aadhaar card contains your demographic as well as biometric data, including name, address, contact details, photo, and biometric details. 1. Keep your Aadhaar card updated 1/5 Aadhaar card is an important document therefore you should keep it updated to avail all the benefits and services launched by the government.