Web analytics involves analyzing data from websites and web pages. It can identify areas of risk, fraud, or ineffectiveness and influence business decisions. Web 2.0 analytics analyzes quantitative and qualitative data from websites to improve customers' online experiences and achieve expected results. Metrics like bounce rate, traffic sources, and abandonment rate are important to analyze. Popular web analytics tools include Google Analytics, True Social Metrics, and Kissmetrics. Mobile analytics differs from web analytics due to differences in how users interact with mobile apps versus websites.