Depending on your organization’s Dashboard setup, you may want to see data from “siblings” in your company’s Company Role hierarchy.  If so, you will see a “Show Sibling Data” checkbox at the top of the view, which you can check/uncheck to show or not show sibling data.  For example, Sales Engineer East and Sales Engineer West might be at the same level within the Company Role hierarchy – and have the same “parent” – and normally they would only see the data within their specific role and that of their “child” roles.  This enables roles to “cover” for each other during busy periods or when lots of people are on vacation or traveling.