Every business organization, small or big, needs valuable data and insights. When it comes to understanding your target audience and customer's preferences, big data plays a very important role. It even helps you anticipate their needs. The right data needs to be effectively presented and properly analyzed. It can help a business organization achieve various goals. Data plays a huge role in understanding valuable insights about target demographics and customer preferences. From every interaction with technology, regardless of whether it’s active or passive, we are creating new data that can describe us. With data being captured through products, video cameras, credit cards, cell phones, and other touchpoints, our data profile is growing exponentially. If analyzed correctly, these data points can explain a lot about our behavior, personalities, and life events. Companies can leverage these insights for product improvements, business strategy, and marketing campaigns to cater towards the target customers. With this focus in mind, this book is proposed that will help the digital marketers to understand the Big Data in a better way and to get a meaning full information out of that. This book is comprised of 16 chapters. Each chapter tries to cover the various aspects on Big Data in order to achieve marketing effectiveness.