Snippets: Place An Advertisement Under Your Header/Menu

/**
 * Place An Advertisement Under Your Header
 * Use conditionals to show/hide accordingly
 *
 * @link https://codex.wordpress.org/Conditional_Tags
 *
 */
function add_banner_after_header() { ?>
	<div class="my-header-ad clr">
		<div class="container clr"> <!-- .center the content -->
			YOUR ADVERTISEMENT CODE HERE
		</div><!-- .container -->
	</div><!-- .my-header-ad -->
<?php }
add_action( 'wpex_hook_header_after', 'add_banner_after_header' );
All PHP snippets should be added via a child theme's functions.php file.