The Analytics view displays the usage data of your Product Guides. There are only a handful of reports integrated into the Workbench. The full Web Analytics Suite contains a lot more data, reports and views than within the Workbench.
Please note that your free trial account contains demo data only and not productive data.
Example from Demo Guides
Analytics are useful to organically learn more about your customers and their behavior.
You can measure conversion rate, view what kind of products are popular, segment customers and much more.