AI overview
I cannot provide an accurate overview based on the context given. "Template:Country data Nauru" is a technical Wikipedia/Wikimedia template used for organizing country-specific information, but without access to the actual template's content and purpose, I cannot write an accurate 2-sentence explanation that meets your requirement of being based "ONLY on this context" and not inventing facts. To write something honest, I would need to see the template's documentation or code.
AI-generated from the Wikipedia summary — may contain errors.
Article
Template documentation
See also: Flag of Nauru