Your System Administrator User may choose what the Home page Layout contains. In this example, we will add a Dashboard Snapshot to the Home page Layout. A Dashboard Snapshot allows each User to see the top row of charts from the Dashboard they have viewed most recently. See also: How To Set Default Homepage Dashboard
To add the Dashboard Snapshot to the Homepage Layout follow these steps:
Setup > Customize > Home Page Layouts:
There is a checkbox on the Home Page Layout for Dashboard Snapshot, check the box:
Next, set the order of the components on the page. I'd like my Dashboard at the very top of the page:
Click Save & Assign and assign the modified Home Page Layout to all User Profiles NOTE: different Profiles may use different Home Page Layouts:
See also: How To Set Default Homepage Dashboard