Dear Belen,
I would agree with Kumararaja but not sure which dashboard your are referring to.
If it is on Adobe Analytics Reports & Interface, you can share the dashboards to Adobe Analytics Users (With proper rights) with read only access.
But if it is Adobe Analytics Workspace, you cannot give them read/write only access.
If the user has the Permission that includes 'Analysis Workspace Access' and 'Analysis Workspace:Save As Template', they can Save and edit your Workspace project.
If the user has the Permission that only includes 'Analysis Workspace Access' and not 'Analysis Workspace:Save As Template', they can only 'Save As' or 'Copy' the Project in their Dashboard to edit.
Be wise to use it or download it as PDF or Schedule it to share.
Thank You!
Arun