If you created your own widget with specific setting and want to share this with your colleagues all you have to do is press the three dots on the top right corner of your widget.
Then choose edit widget
Then at the left you will see the share button, activate that and you will be able to choose what colleagues to share it with.
To share a dashboard you open the dashboard and scroll down to the bottom and press the More Options and choose edit dashboard.
Then press share on the bottom and add the agents that should have access to show the dashboard on their account.