In this era of Mankind , All the electronically generated data is so huge , using traditional systems to analyze and gather useful information is out of scope.
Hadoop is just one step in trying to solve the problem of Analyzing Massive amounts of Data, to gather useful information , which is needed for Decision Making , As we all know " Taking the experiences from the past and predicting the future is Decision Making "


Hadoop just provides the frame work  and Computational Model , that will help us to take this decisions by processing the Data.

When i say data , it could be structural or unstructural.