Big Data is difficult to define. Many people have different ways to define it. One person may refer to it as the collection of huge data sets that are too large to process. Someone else may describe it as the statistics and algorithms from a collection of large data sets used in making marketing or policy decisions.
Mass data collection has become a greater concern as more information about people's live are being collected (e.g. browser activity, health information from wearable technology, location tracking). It is important to be informed about where that information is being stored, how secure it is, and who can access that information.