A Unique Identifier is a specific code or number assigned to an object, person, or entity to distinguish it from others. This identifier ensures that each item can be easily recognized and tracked without confusion. For example, in databases, a unique identifier might be a Social Security Number or a Customer ID. These identifiers are crucial in various fields, including technology, finance, and healthcare. They help maintain accurate records and facilitate efficient data management. In systems like inventory management or patient records, unique identifiers prevent duplication and errors, ensuring that each entry is distinct and easily accessible.