Web Mining – i.e. the application of data mining techniques to extract knowledge from Web content, structure, and usage is the collection of technologies to fulfill this potential. Web mining is the application of data mining techniques to extract knowledge from Web data, where at least one of structure (hyperlink) or usage (Web log) data is used in the mining process (with or without other types of Web data). This paper provides a brief overview of the accomplishments of the
field, both in terms of technologies and applications. In this paper, we first introduce the concepts related to web mining. The aim of this paperis to give overview of web data mining categories.