WordPress: Create a new widget area

add_widget_area.php

<?php
function register_widget_area() {
    register_sidebar( array(
        'name' => 'Widget Area Name',
        'id' => 'new_widget_area',
        'before_widget' => '<div class="widget">',
        'after_widget' => '</div>',
        'before_title' => '<h1 class="title">',
        'after_title' => '</h1>',
    ) );
}
add_action( 'widgets_init', 'register_widget_area' );
?>

display_widget_area.php

<?php dynamic_sidebar( 'new_widget_area' ); ?>