Who can tell me what big data is?

The definition of big data can be defined using several keywords.

First of all, "large scale", this scale can be measured from two dimensions, one is the accumulation of large amounts of data from time series, and the other is more detailed data in depth.

Secondly, "diversity" can be different data formats, such as text, pictures, videos, etc., can be different data categories, such as population data, economic data, etc., and can also have different data Sources such as the Internet, sensors, etc.

Third, "dynamic". Data is constantly changing. A large amount of data can be added rapidly over time, or it can be data that is constantly moving and changing in space.