I'm failing to understand what they mean by component in JSF terms?
As i see it, components is finished utils to use. Like Selects, radio, checkboxes, fileupload, menu navigations, tab navigations, Result listing in tabels (myfaces/tomahawk has a good dataTable component for this). And so on...
These components write out finished html code. So in your jsp page you only need to include these component tags. Well you get more info by reading some tutorials about JSF.