Web mining actually used to understand customer behaviour, evaluate the effectiveness of a particular Web site, and help quantify the success of a marketing campaign. It is the integration of information gathered by traditional data mining methodologies and techniques with information gathered over the World Wide Web. It allows you to look for patterns in data through content mining, structure mining, and usage mining. Web mining is an important component of content pipeline for web portals. This article mainly focus on “mining, web, gathered, information, campaign”.