Generally speaking, the aim of a Dashboard is to contain all information that will help you to monitor a bunch of elements, a concept or whatever you decide. It is only a visual container which will help you to be more efficient in your monitoring tasks.
For example, you can dedicated a Dashboard to monitor an ERP, containing all information that may help to be sure that the ERP of my company is running well.
A dashboard is always linked to a tile of the hive. You can access to a dashboard by clicking on the tile representing it in the hive.

In our exempla
The ERP dashboard consists in 8 boxes that contain information on the tile. We call these boxes widgets.
You can easily switch between dashboards of the same group of color. Click on the left border of the dashboard. The list of dashboard belonging to the group will appears automatically.
A Dashboard has 2 modes:
When you open a dashboard, you are in Visualization mode.
Each widget will be updated visually every minutes.
You can visually organize the dashboard as you want.
In order to change the layout of widgets, add widgets, …, you must enter in the edit mode.
Click the “edit button” on the top left corner .
Being in the edit mode includes some specific access:
First click on the widget you want to add. It will become highlighted in blue. You can scroll using left and right arrow to select the widget you are looking for.
Then clicking on the button “+ ADD” located on the top of the blue area, will add the widget on Dashboard.
This new widget will always appear on the right of the Dashboard, sticked to the top.
Depending on the widget, you will have an empty box or the default view.
To make it operational, you will need to configure the widget, that is very easy to do (see next chapter).
You can move each widgets and place them were you desire by simply dragging them.