Today, we live in cyber world where everything is digital and data is king. The world is experiencing a data revolution and it permeates almost every aspect of modern life. With the world witnessing a digital revolution, data is now the fuel that drives forward the 21st century. In this age, data drives everything and the amount of data you have to deal with is immense and complex.We are in the big data era. Data is on everybody's mind and big data is hitting us from all angles. Big data refers to the large volume of structured and unstructured data with the implicit potential to be mined for information. It consists of large amounts of data produced very quickly by a high number of diverse sources. This data is due to Internet, high-speed networks, mobile, IoT, social data, industrial operations, etc. all across the world. Big data is a collection of complex data sets that are so intense in their volumes that traditional data processing software cannot handle them. It has become the mainstream technology across various industries. The growth in big data has been phenomenal. Without a doubt, BD will continue to play a crucial role in many industries around the world.