Web Usage Mining is the application of data mining methods to the analysis of recordings of Web usage, most often in the form of Web server logs. The goal of web usage mining is to find the user’s access patterns quickly, such as the frequent traversal paths, frequent access page-set, and user clustering. Web usage mining mines the data generated by the web users visiting recorders while the interaction with the web. The mining processes include data preparation, mining process, and process analysis. This paper presents research issues, technique and application areas of web usage mining.