The point of a UUID is to have a universally unique identifier. There’s generally two reason to use UUIDs: You do not want a database (or some other authority) to centrally control the identity of records. There’s a chance that multiple components may independently generate a non-unique identifier.

Is UUID a number or string?

UUIDs are an octet string of 16 octets (128 bits). The 16 octets can be interpreted as an unsigned integer encoding, and the resulting integer value can be used as a subsequent arc of {joint-iso-itu-t uuid(25)} (or 2.25) in the OID tree.

What UUID means?

Universally Unique Identifiers, or UUIDS, are 128 bit numbers, composed of 16 octets and represented as 32 base-16 characters, that can be used to identify information across a computer system.