Assuming you elected to install the complete package, MongoDB Compass will auto-launch once the installation completes. You will need to scroll down through its license agreement (separate from the license agreement for MongoDB itself), and click Agree. You can follow and then close the initial help tutorial, and also set Privacy Settings that control whether or not you will be sending crash reports, usage statistics, and requesting automatic updates to/from MongoDB Inc.
This utility is described in more detail in the Chapter 2, Understanding MongoDB Data Structures, We also use this utility to create our first database and collection (see following sections). Here is the Compass screen as seen on Windows:
