Purpose of DeepSee?

DeepSee has a pretty good Developer Tutorial in the Documentation. This is a very good place to start. There are also the "HoleFoods" and "Patients" cubes in the SAMPLES namespace that you can take a look at and play around with to see some of the basic features of DeepSee

In Short DeepSee is an analytics tool to incorporate Actionable BI views of your data embedded within your application.  DeepSee sits right on top of your application data store so there is no extract or transformation of data.  This allows the dashboards created to be as up-to-date with transactional events as is appropriate up to near real-time.  Users of these dashboard can then initiate action within the application directly from the Analytical view hence the "Actionable BI" label.

A great way to get started is to go to our online learning portal.    Here is a link to the learning resource guide for DeepSee.  https://learning.intersystems.com/course/view.php?id=19