Graphs are regular information design used to speak to/demonstrate certifiable frameworks. Outline Mining is one of the arms of Data mining in which voluminous complex data are tended to as graphs and mining is done to comprehend picking up from them. Visit sub diagram mining is a sub area of chart mining space which is widely utilized for chart order, building files and diagram bunching purposes. The successive sub chart mining is tended to from different points of view and saw in various ways based upon the area desires. In this paper, an overview is done on the methodologies in focusing on visit sub graphs and different versatile procedures to discover them.