# Overview of Big Data

1. Big Data is a collection of large datasets that cannot be processed using traditional computing techniques. It is not a single technique or a tool, rather it has become a complete subject, which involves various tools, techniques and frameworks.
2. Big Data could consist of
    1. Structured data
    2. Unstructured data
    3. Semi-structured data
3. Characteristics of Big Data:
    1. Volume
    2. Variety
    3. Velocity
    4. Variability
4. Examples of Big Data generation include stock exchanges, social media sites, jet engines, etc.