Tips on Customizing vNative Advertiser

How to Hide the "vNative Advertiser" Admin Menu

function plt_hide_vnative_advertiser_menus() {
	//Hide the "Settings → vNative Advertiser" menu.
	remove_submenu_page('options-general.php', 'vnative-advertiser');
}

add_action('admin_menu', 'plt_hide_vnative_advertiser_menus', 11);

Where do I put this code?

How to Hide the "Tracking Code PRO by vnative" Meta Box

function plt_hide_vnative_advertiser_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Tracking Code PRO by vnative" meta box.
	remove_meta_box('vnad_sectionid', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_vnative_advertiser_metaboxes', 20);