Big data

Big data is a term used for certain database systems. It is used for a number of technologies which help to organize, gather and analyse data. 

At least some of the following characteristics apply:
 There are huge amounts of data

 The data changes very often

 It is difficult to structure the data so that it can be used easily

 Use 
Big data is used to analyse different subjects. Through the analysis, new information can be gained. Bigger amounts of data make it easier to find reliable information. It is used in many different areas, such as government, health care, insurance, media, advertisement and information technology.

 Origin 
The data is gathered among other things through:

 Surveillance
 the use of credit cards
 Electronic Communication (for example E-mail and smartphones)
 Internet and social media (for example from using Google search or when visiting Facebook)
 Internet of things (objects that can connect to the internet, for example Amazon Alexa)
 governments and public authorities (for example tax data, census data)

 Critique 
Big data has been criticised for different reasons. One prominent criticism is the increasing surveillance to gather data, which takes place in many new forms. Edward Snowden has revealed how the American National Security Agency (NSA) uses digital technology to spy on people around the world. Another prominent criticisms is data privacy, which is about the risk of sensitive personal data leaking because it is not protected well enough.

A more fundamental critique of big data is just because it is bigger, it is not automatically better. The quality of the data still has to be controlled. It also says that data analysis can only ask "what" is happening, but not "why" it is happening.

 References 

Category:Databases
Category:Data science
Category:Privacy