The document discusses several topics related to data mining and analytics of web data: 1. It introduces common categories of web mining including web usage mining, web content mining, and web structure mining. 2. Example goals of web analytics are improving website design, measuring marketing strategy effectiveness, and personalization. 3. Challenges of web data analysis include messy and imperfect data that requires extensive preprocessing, focusing on actionable metrics, and new types of event-driven data. 4. Advanced data mining applications discussed include navigation analysis, multivariate testing, semi-supervised learning, and recommender systems.