This is used for specifying the target resources you would like the implementation to apply to. See the image.
All Dashboards
If selected, the implementation will apply to all dashboards including the newly created ones that have not been saved yet.
Customize
If selected, you can specify the dashboards you want the implementation to apply to.
OK
Applies the setting and exits the dialog.
Cancel
Cancels the setting and closes the dialog.
Help
Displays this help document.