Users dashboard is the entry point of Analytics Client. It shows an overview of your application usage.
Users is a static dashboard and you can not add, delete or rearrange its widgets. Here is an example below:
You can see total users for specified period, compare it with number of sessions and how many are new users. For every one of these figures you can see the trends and understand what is going well and what is not. You can see what is most used version of your application as well.
If you need more details you can take a look at Users, Time of day and Session length charts.
Another usefull piece of information is present by Loyalty pie chart.