Big data analytics is an art of handling and analyzing large and complex data to find out useful hidden insights from raw data. Big data analytics uses predictive modeling and statistical methods to help organizations improve their business by understanding data and making decisions for the future. Big data analytics is not only restricted to structured data but can be used for unstructured, and semi-structured data also.
Big data analytics is necessary because of the increasing data very huge in recent years. Big data analytics is used in smart health care, traffic control, telecom, manufacturing, search quality, and trading analytics.
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You can check out this video on big data analytics tutorial for detailed explanation: