A portlet is a Web
-based component that will process requests and generate dynamic content. The end-user would essentially see a portlet as being a specialized content area within a Web page
that occupies a small window
in the portal page. Depending on the content nature of the Web site
providing the portlet you could use this area to receive different types of information such as travel information, business news, or even local weather. The portlet provides users with the capability to customize the content, appearance and position of the portlet.