A National ID is an official identification document issued by a government to its citizens. It serves as proof of identity and can be used for various purposes, such as voting, accessing government services, and verifying age. National IDs often include personal information like name, date of birth, and a unique identification number. Many countries have implemented National ID systems to enhance security and streamline administrative processes. For example, in countries like India and Germany, these IDs help in managing population data and ensuring that individuals can access their rights and services effectively.