What is a unique identifier and why is it important?

A unique identifier is a distinct value or code assigned to an entity, such as a person, product, or record, ensuring that it can be uniquely distinguished from others. It is important because it prevents confusion and errors in data management, facilitates efficient retrieval and analysis of information, and enhances interoperability across different systems. Unique identifiers play a crucial role in databases, identity management, and various applications where precise tracking and referencing are essential.