What is the use of RBUUID Annotation in Resource Bundle

PTC Java Doc says

The unique identifier for the bundle class. This identifier is required for all default-locale resource bundles (including customer-created bundles) and is used by the localization team to track bundle changes, including moves and renames.

I not able to understand the real time use case, how it will be used by localization team to track bundle changes, including moves and renames.