The WebPartZone control serves as the primary control in the Web Parts control set for hosting WebPart controls on a web page. In the Web Parts feature, a zone is a defined region on a web page that contains Web Parts controls. The primary functions of a zone are to lay out the controls it contains, and to provide a common user interface (UI) for those controls.
Every page to which you add a WebPartZone control must also have a WebPartManager control. For more information, see WebPartManager control.
To add a WebPartZone control to a page
Drag the WebPartZone control from the Toolbox task pane to your page.
When you have added a WebPartZone to your page, you can add other ASP.NET controls to the WebPartZone to design the content and layout of that zone on your page.
For a full description of all WebPartZone control properties, see WebPartZone Properties in the MSDN library.