Big data refers to large volumes of data that are too large and complex for traditional data processing systems. This type of data is being generated from various sources like mobile devices, social media, the internet of things, and more. Big data is important because analyzing it allows companies to gain valuable insights that can help them improve their products and services, make better decisions, and transform how they interact with customers. While big data technologies and tools are evolving, the core goal is still about using data to help solve problems in an objective way.