We live in the world of Technology. Technology is at the edge of its best development than ever before. It is growing at the speed of a python. In this growth many big factors have played an amazing role than any others. IT industry is one of them and almost the heart of present technology. IT field has given almost everything to the human being that they had not even imagined before. But there are some special sub topics also it has which are famous among the mouths of the people. Big data is also one those sub topics. Big data is well known specially among the people attached with It sector. Let’s know that why this word is so special in modern era.