Big Data are digital data amounts that are too complex for conventional data processing. They consist of structured and unstructured elements. The Volume is too large to be saved, moved around or processed in a conventional way. Data speed describes how fast the amounts of data change and how fast new data are added. For valuable usage of Big Data, data are analyzed in real-time and current trends integrated. Beside the high volume and the speed of changes, the content of data sets is very variable and include personal descriptions, demographics, numeric data as well as biometric data, data from image- or voice-processing or operating data. Efficient computer support and specialists in the area of data science are needed to get a profitable value out of this amount of data. Big Data allows to make use of market trends and to identify optimization-potential.