This is a unique 128-bit identifier. Its peculiarity is uniqueness, it allows you to generate random identifiers without the risk of repetition. The total number of GUID keys is very large (2128). The abbreviation GUID was introduced by Microsoft. The rest of the world uses the term UUID.
Consists of thirty-two hexadecimal digits, separated by hyphens. They can also be surrounded by curly braces. For example: 2170abcb-8499-47de-be64-8cc8b290ebd5
GUID is used as a unique identifier in programming as keys in a database. Due to the high uniqueness of the UUID, when generating it, you don't have to worry about checking duplicates.