Every day, we generate 2.5 quintillion bytes (2.5 Million Terabytes) of data and 90% of the data in the world today has been created within the past two years. This data come from everywhere: from sensors used to gather climate information, posts to social media sites, digital pictures and videos posted online, transaction records of online purchases, and from cell phone GPS signals to name a few. This data is Big Data
Big data is more than a challenge; it is an opportunity to find insight in new and emerging types of data, to make business more agile, and to answer questions that, in the past, were beyond reach.
Big Data is fast emerging as a technology trend for organizations to leverage large volume of variety of data (structured, unstructured and semi structured) generated at a high velocity, for analysis and deriving better insights for their business.