These links will be impossible to find if they're just links; we'll wrap them in an aria landmark element and add a heading.

ID24 Demo 5

/*
 * Fetch HTML for links and wrap in a container. Add heading and ARIA landmark role.
 *
 * @param integer $post_ID of current post.
 *
 * @return full HTML block.
 */
function id24_social_block( $post_ID ) {
	$links = id24_create_links( $post_ID );
	
	$html = "
			<nav aria-labelledby='id24-social-sharing'>
				<h3 id='id24-social-sharing'>" . __( 'Share This Post', 'id24-social-sharing' ) . "</h3>			
				<div class='id24-social-share'>				
					$links
				</div>
			</nav>";
	
	return $html;
}