This article aims to provide a state-of-the-art assessment of the research work carried out so far in microbubble-aided transport processes. The different methods of microbubble generation and the properties of microbubble have been reported in this article. The different components that constitute the microbubble are also discussed. The characteristics of microbubble are pointed out. The measuring methods of zeta potential in microbubble system are described. This article provides an update of important research works in the microbubble technology. This article also reports the important future research scope and their significance in the microbubble flow system. For researchers, this article may be useful for further research in microbubble technology. (C) 2012 Elsevier B.V. All rights reserved.