UUID
UUID (Universally Unique Identifier) is a standardized 128-bit identifier used to uniquely label information in computer systems without central coordination. It ensures global uniqueness across space and time, commonly implemented as a string of 32 hexadecimal digits separated by hyphens (e.g., 123e4567-e89b-12d3-a456-426614174000). UUIDs are widely used in distributed systems, databases, and applications to avoid collisions when generating unique keys.
Developers should use UUIDs when they need globally unique identifiers in distributed or decentralized systems, such as for primary keys in databases, session tokens, or tracking resources across microservices. They are particularly valuable in scenarios where centralized ID generation is impractical, as they can be generated independently by different nodes without risk of duplication, enhancing scalability and reliability.