In Oracle E-Business Suite, a specific region of an application page can be displayed as a portlet in Oracle WebCenter Portal, Oracle Portal, or any WSRP-compliant portal. Portal applications provide you with a common, integrated starting point for accessing all your data. You can personalize the application region that is displayed as a portlet. Any personalizations you make to that portlet region appear only when you display that region from the same portlet.
Additional Information: If a portlet contains a More... link that drills down to a personalizable region, then any portlet-level personalization you make to that region also applies to the drill-down region (from the More... link).