The function of metadata in data organization is to provide information about the data itself, making it easier to manage, retrieve, and understand. Metadata includes details like data type, structure, format, and relationships to other data, acting as a data descriptor. For example, it helps users identify file contents without opening them and aids in categorizing and indexing information in databases. Effective use of metadata improves data organization, enhances search capabilities, and facilitates data governance, ultimately leading to better data quality and accessibility.