Big data refers to large and diverse data sets that are analyzed to reveal insights. This document discusses how big data is important for the mobile market. It is gathered from various sources like loyalty programs, social media activity, emails, and sensors in phones. Big data helps mobile applications meet customer expectations, analyze user experience, access real-time data, improve revenue, and personalize services. Industries like retail, healthcare, and banking widely use big data. It will transform future mobile apps by helping businesses understand user needs better.