It is possible to describe Big Data in four

words

• Volume: Big Data represents large amounts of data. It is generally said that 90% of the data available today have been created in the last two years.

• Speed: Data is generated, captured and shared at ever faster speeds Data and data delays are always shorter and are most often processed in real time or near real time.

• Variety (or heterogeneity): the analyzed data are not necessarily structured. They can come from different sources (and have a different format, such as text, images, multimedia content, digital traces, etc.) and can be combined. Data stored in an internal customer file can be combined with external data from social networks, search engines, official notice sheets or open data portals managed by public authorities.

• Value: the last characteristic is the added value that the analysis of the data represents and the usages that can be made of it.