① Immediately huge.

The data size is large, exceeding the data size of previous studies, and even exceeding the data size that current researchers can control.

② Fast.

Big data generation speed, based on a large number of only terminal devices and the Internet, every minute and every second to produce and disseminate massive amounts of data information.

③ Diverse categories.

Big data comes from a diversity of types, including structured, semi-structured and unstructured forms of data, such as web logs, videos, pictures, location information, etc.

④ Big data can be used to generate a large amount of data and information every second.

④ It is difficult to distinguish between truth and falsehood.

Big data has large uncertainties, such as data noise, missing, inconsistency, ambiguity, etc., and this uncertainty is always present.

⑤ Huge value.

Big data allows people to measure and understand the world in an unprecedented dimension, which contains great value, and the ultimate goal of big data is to mine value from data.