The detection of specific gases in different settings have emerged an essential requirement towards management of different sectors such as industries, agriculture, laboratories, supply chains etc. The development of sensors using different materials play pivotal role in application of gas sensors in real time conditions. Many different type of materials have been studied, utilized and applied for the development of gas sensors. The compilation of research advances in the field of new gas sensors would provide better understanding towards applications of advanced functional materials. The current compilation encompasses recent trends in the area of nanostructured gas sensors. Various aspects of developing a gas sensor such as materials synthesis, characterization and optimization of sensor parameters, gas sensing methodologies, mechanistic studies, theoretical modeling and real-life applications are discussed. The research advances in form of concise reviews and original research articles in different gas sensing areas have been covered. The current research direction in developing novel materials, various technologies adopted to advance the sensing capabilities in order to realize an end user preferred device is elucidated. This effort is aimed at providing various avenues to a researcher where research can be focused in order to develop a gas sensor.