Metadata refers to the descriptive information of data, which generally includes the data's name, classification, size, format, creator, creation date, modification date and other attributes. The function of metadata is to help users understand and use data resources more conveniently and quickly. The use of metadata is also widely used in modern digital technology, such as search engines, data uploading, digital libraries and other fields.

Metadata is a necessary means of data management in the digital age, which makes data resources easier to manage and use. Metadata can not only help users find and use data quickly, but also help maintainers maintain and manage data quickly and effectively. At the same time, metadata can also be stored as a part of data in metadata database, which is convenient for data backup and recovery.

In this information age, metadata has become a necessary tool. It not only simplifies the management and maintenance of data, but also makes the use and enjoyment of data easier and more efficient. The use of metadata needs to be widely recognized and promoted, forming a good atmosphere for sharing and utilizing data resources in the whole society.

In a word, metadata refers to the descriptive information of data and is a necessary means of data management in the digital age. It can help users understand and use data resources faster, and it is an essential tool for managing data resources. It is necessary for all sectors of society to promote the citation and utilization of metadata and improve the efficiency and value of data resources.