The Simple Meaning of BIG DATA is, large amount/volume of structured and unstructured data, data which are unable to kept/stored on one machine. In 2012 Gartner (an american research and advisory firm ) introduced 3Vs which describes Big Data. Volume - The amount of generated stored data. Velocity - This term explains the speed at which the data is generated and processed.(the speed which Big data should be analysed). Variety - Data will have different kind of types; structured, unstructured. Also by adding two more characteristics this can be called as 5Vs 4. Variability - Inconsistency of the data 5. Veracity - Uncertainty of the data _________________________________________________________ WHY? For a moment think that you have a cloth shop. If you can track all your previous data of your business, customers, trends and then apply analytics to that and get som...