Tips on Customizing Marketing Optimizer

How to Hide Marketing Optimizer for Wordpress Plugin Admin Menus

function plt_hide_marketing_optimizer_menus() {
	//Hide "Settings → Maketing Optimizer for Wordpress".
	remove_submenu_page('options-general.php', 'settings-sub-menu');
	//Hide "Marketing Optimizer".
	remove_menu_page('marketing-optimizer-settings');

	//Hide "Landing Pages".
	remove_menu_page('edit.php?post_type=mo_landing_page');
	//Hide "Landing Pages → Landing Pages".
	remove_submenu_page('edit.php?post_type=mo_landing_page', 'edit.php?post_type=mo_landing_page');
	//Hide "Landing Pages → Add New".
	remove_submenu_page('edit.php?post_type=mo_landing_page', 'post-new.php?post_type=mo_landing_page');
	//Hide "Landing Pages → Categories".
	remove_submenu_page('edit.php?post_type=mo_landing_page', 'edit-tags.php?taxonomy=mo_landing_page_category&post_type=mo_landing_page');

	//Hide "Calls-To-Action".
	remove_menu_page('edit.php?post_type=mo_ct');
	//Hide "Calls-To-Action → Calls-To-Action".
	remove_submenu_page('edit.php?post_type=mo_ct', 'edit.php?post_type=mo_ct');
	//Hide "Calls-To-Action → Add New".
	remove_submenu_page('edit.php?post_type=mo_ct', 'post-new.php?post_type=mo_ct');
	//Hide "Calls-To-Action → Categories".
	remove_submenu_page('edit.php?post_type=mo_ct', 'edit-tags.php?taxonomy=mo_ct_category&post_type=mo_ct');

	//Hide "Pop-Ups".
	remove_menu_page('edit.php?post_type=mo_sp');
	//Hide "Pop-Ups → Pop-Ups".
	remove_submenu_page('edit.php?post_type=mo_sp', 'edit.php?post_type=mo_sp');
	//Hide "Pop-Ups → Add New".
	remove_submenu_page('edit.php?post_type=mo_sp', 'post-new.php?post_type=mo_sp');
	//Hide "Pop-Ups → Categories".
	remove_submenu_page('edit.php?post_type=mo_sp', 'edit-tags.php?taxonomy=mo_sp_category&post_type=mo_sp');
}

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

Where do I put this code?

How to Hide Marketing Optimizer for Wordpress Plugin Meta Boxes

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

	//Hide the "Marketing Optimizer Variation Id" meta box.
	remove_meta_box('mo_page_variation_id', $screen->id, 'side');
	//Hide the "Variation Testing StatsReset All" meta box.
	remove_meta_box('mo_page_variation_stats', $screen->id, 'advanced');
}

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