GUID (Global Unique Identifier) and UUID (Universally Unique Identifier) are different implementations of the same idea. GUIDs and UUIDs are used as IDs (to identify) unique objects or records. These are very common in a big data environment where coordinating unique IDs in a central location is difficult to do. For practical considerations and nearly all use cases, there is no difference between GUID and UUID.
Both GUIDs and UUIDs are 128 bit values, generally represented by 32 lowercase hexadecimal digits, split into 5 groups by hyphens. For example:
GUID and UUID are often used as synonyms,but GUID is sometimes used to refer to the Microsoft implementation of the UUID standard.