Image azure-client-id.png illustrates the Overview page for a client app called DatabaseClientApplication. Its components are as follows, from top to bottom:
In the navigation bar on the left, at the top, is the Overview menu.
On the right is the contents of the Overview page. From top to bottom are:
The label Essentials
Application (client) ID
This page lists other information including: Object ID, Directory (tenant) ID, Supported account types, Client credentials, Redirect URIs, Application ID URI, and Managed application