Data sets are collections of organized raw facts and numbers which represent various aspects of the real world. They can include numerical data as well as text, images, audio files, etc.
Metadata provides additional information about other data. It describes the characteristics and properties of data such as its format, source, date created, etc.
Structured vs Unstructured Data: Structured data is highly organized with predefined formats, making it easy to analyze. Unstructured data, on the other hand, lacks a specific format and requires advanced techniques for analysis.