A few years ago, journalists were invited to press conferences in which he explained what the big data was and are trying to convince the potential of what they had before. Companies introduced to the mysterious big data and tried to convince them it was something that would change the world. The same was true of the heads of the companies, who also attended events where they had remarkable success cases of all those pioneers who had begun to test the potential of big data. Years later, things have changed a lot. No longer have you needed to explain what are the big data and companies the focus has changed.