Big Data Big data can be classified into  structured, semi-structured, and unstructured data . Structured data is highly organized and fits neatly into traditional databases. Semi-structured data, like JSON or XML, is partially organized, while unstructured data, such as text or multimedia, lacks a predefined structure. Types of Big Data Structured data Unstructured data Semi-structured data Characteristics of Big Data Volume , Variety , Velocity , Value , Veracity .