Mixpanel is an analytics tool that allows users to track actions, create funnels and retention charts, and analyze notifications and revenue. It can be integrated into websites and mobile apps using JavaScript libraries or SDKs to track events like page views. Examples shown include tracking paths through content from Google to a main page to order, as well as trends and retention. Notifications are also demonstrated as reminders in an email workflow from signup to multiple reminders. Revenue charts show increasing revenue over time.