n present scenario data is most important part for every organization, company , business, and even for newly startup. Data helps in many ways such as taking important decisions related to their growth. When the data becomes too large, increases beyond the limit and become more complex to handle then we called it BIG DATA. Big data deals with scalability, unique computations, storage and processing challenges. Big data handle the wide amount of data, store it and further process that data in an efficient manner. So that to make important decisions information can be retrieved from the wide amount of data. Even then many companies and organizations are avoiding the use of big data because of the security and some privacy issues that need to be addresses.