/* Add Code HTML After Single Post Content */
function add_mktg_code_below_article() {
	$html = '<div data-contentexchange-widget=".." data-contentexchange-source=".."></div>';

	echo $html;
}

add_action( 'jnews_single_post_after_content', 'add_mktg_code_below_article' );

/* Add Code HTML After Category Content */
function add_mktg_code_below_category_content() {
	$html = null;

	if ( is_archive() && is_category() ) {
		$html = '<div data-contentexchange-widget=".." data-contentexchange-source=".."></div>';
	}

	echo $html;
}

add_action( 'jnews_after_main', 'add_mktg_code_below_category_content' );

/* Add Code Script Before The Closing Body Tag */
function add_mktg_script_in_footer() {
	$html = '<script src="https://URL/static/tracker.js" async></script>';

	echo $html;
}

add_action( 'wp_footer', 'add_mktg_script_in_footer' );