Big data indicates data sets that are too large, complex and/or weakly structured to be dealt with by manual data-processing methods. It can combine various data sources, like data from smartphone usage, smart homes or connected cars as well as records from different monitoring systems. This data is processed and analyzed with specific software. Nowadays numerous businesses are processing large data sets. Big data is used to improve efficiency and productivity in the fields of technology development, information technology, and marketing. It is typically employed by social networks and search engines.