Explain the use of JSP error pages.

JSP error pages, also known as custom error pages or error handling pages, are used to handle and display appropriate error messages or perform specific actions when an error occurs during the processing of a JSP page. They help provide a user-friendly experience and can be used to redirect users to a generic error page or display specific error information based on the type of error encountered. JSP error pages are defined in the deployment descriptor (web.xml) using the <error-page> element, specifying the error code or exception type and the corresponding error page to be displayed.