Smart is the popular word which has become a general taught in every human brain. The Acronym of the word Smart refers to Specific Measurement Achievable Relevant Time-Oriented. The world is moving towards future technologies by laying different steps to be smarter in the future generations. A Smart World is a collection of different technologies which are getting improved better and better with the invention of Automation in every sector with wide range of application step by step. As the automation is improving day by day in each sector, with the advancement of technologies, resulting in advantages such as time reduction, efficiency, producing accurate results, scalability, and flexibility and so on. This paper shows how the world is moving into smarter technologies, with their roles in different sectors. Focusing on the types of sensors and the applications that the smarter is entering.