The Dashboard is where you start your work every time you access the platform. It contains real-time updates and shortcuts to your most recent and most important items.
Each Workspace you are a member of has its own customizable dashboard. You can add, remove and re-arrange widgets that are relevant to the work you do in that Workspace. Use the 'Add Widgets' button at the top to find widgets with data that you want on your Dashboard, use the 'x' to delete widgets or grab a widget to move it around.
The wider your screen, the more columns you will have to arrange your widgets. Every time you re-arrange your widgets, the dashboard will auto-save that layout.