Update functions.php

Add banner on header space
you must you must to add this code on header.php file

<?php if ( is_active_sidebar( 'extra-header-widget-area' ) ) : ?>
<aside class="extra-header widget-area half right" role="complementary">
	<?php dynamic_sidebar( 'extra-header-widget-area' ); ?>
</aside>
<?php endif; ?>