Is there a limit to the number of dashboards I can create?
No, create dashboards for any purpose you need.
Can I create a dashboard that only I can see?
Yes, when creating the dashboard select the Private visibility option. Only you will be able to see the dashboard.
Can I create a dashboard that others at my company can see?
Yes, when creating the dashboard select the Shared visibility option. Only users at your company will be able to see your dashboard.
Can other users modify a shared dashboard?
Yes, any user with access can modify a shared dashboard.
Why can't I delete or change widgets on System dashboards?
System dashboards are the same for every user and unable to be changed.