The Internet of things is a communication network covering device, software and access services that enable us to control and track and analyze physical events around us. These physical events include production processes, energy networks, patient tracking systems, recycling processes, transportation, smart buildings, shopping, etc. areas such as can have measurable magnitudes or control systems. In addition, the devices and sensors in this network are organisms that can establish human-human, human-machine, machine-machine communication. There are many studies on analyzing the big data produced by the devices involved in this organism and ensuring the security of this data. In this study, one of the qualitative research methods, literature review, An Overview of the Internet of things and application areas identified by previous studies were examined and information about the current situation was given.