Technologies were being developed in laboratories for military purposes in the past, and its spread in daily life was a result of a long-term process. However, because of the rapid spread of technological developments and the facilitation of information access processes, we can become aware of new technologies in a short time and shape our daily lives with the advantages of the use of these technologies. The Digital Twin concept, which is expected to cause changes in many areas of our lives in the near future, has entered our lives with the industry 4.0 industrial revolution and is defined as a digital copy of a physical system. Digital Twins have started to take place in our lives in other civil fields as well as in industrial and engineering fields, with the advantages they offer in terms of time and cost. We will discuss the current works and future opportunities in health, industrial, smart city management systems applications where this promising technology will be seen directly reflecting on daily lives.