In today’s world of the computer, human life is very much dependent on technology. Our personal, professional, social life is fully dependent on data. At every second of our life, we are dealing with data. In earlier days only people produces data and try to store it manually, but as the machines are becoming smarter they also producing the data. By 2016 it is estimated that 22.9 billion devices are actually connected to the internet. So, without any manual interrupt, these devices are producing data. This data is originated through mobile phones, laptops, cameras and many other electronic gadgets. Due to the huge amount of data the challenge of data management arises. Big Data is a very familiar term. But it not just a large amount of data, it is a concept which actually explains about gathering the data, organizing, analyzing and getting the information out of the data. So big data is a huge amount of data having the ability to store and process the data and collecting the relevant amount of data. This helps us to find out hidden facts and information from the data collection. This presentation focuses on the concept of big data, source of generation, need of big data management, various characteristics such as volume, variety and velocity, big data lifecycle, available sectors or fields, Big data in healthcare, Big data’s application in healthcare such as electronic health record, telemedicine, and very popular fitness band with one example in detail.