Edit dashboard: Opens the dashboard design so you can make the desired changes. See more in Edit dashboard.
Share dashboard: Opens the shares screen of this dashboard so you can share it with more people, as well as edit the shares already made. (option not available for dashboards that were received through sharing). See more in Share dashboards.
Delete dashboard: Removes the dashboard. If the dashboard was received through sharing, this option removes the share. The source user dashboard remains unchanged. See more in Delete Dashboards.