'Big Data' consists of high-volume, high-velocity and high-variety information assets that require efficient forms of information processing to support insight and decision making.
Some examples of Big Data information sources include:
Shopping information from an e-commerce environment
Social media analytics
IoT sensors in cars, domestic appliances, industrial machinery, healthcare etc
What complicates the task for companies is not the data itself but the management of metadata which adds information and permits a more sophisticated approach to analytics, thus making the data itself a more valuable asset. Properly tagged data is searchable and becomes meaningful and actionable content.