The information in the Account Dashboard Header highlights Account info fields for sales reps throughout the course of working within this Account without having to drill down.
The Header appears at the top of the Account Dashboard. Select up to four fields that can be displayed across the top of this bar.
You can configure which fields appear in the header.
Go to Settings -> Accounts -> Account Dashboard Layout -> Edit the Account Header configuration
Add up to four fields from the available Account fields, including any custom fields, to the layout.
The fields will appear in the Account header as shown above.