Explain the JSP forward action.

The JSP forward action allows you to transfer control from one JSP page to another resource, such as another JSP page, servlet, or HTML file, on the server side. It is achieved using  <jsp:forward> action. When a forward action is executed, the request and response objects are transferred to the specified resource, and the response generated by the forwarded resource is sent back to the client. This can be used to modularize your application and delegate specific tasks to different resources.