Answers for "how to add new page in wordpress and redirect to it"

wp_redirect to home page

function redirect_to_home() {
  if(!is_admin() && is_page('2')) {
    wp_redirect(home_url());
    exit();
  }
}
add_action('template_redirect', 'redirect_to_home');

redirect wordpress

add_action( 'template_redirect', 'redirect_to_other_page' );
function redirect_to_other_page() {
    if ( is_page( 143 ) ) {
	  
      wp_redirect( '"'.home_url().'/services/messenger/"', 301 );
      ///wp_redirect( 'example.com/page', 301 ); 
    exit;
    }
}