Since version 4.1 of WooCommerce, the creators of this magnificent plugin have given us a new item in the administration menu of our WordPress, the silly, useless, annoying, unnecessary and incomprehensible menu called “Marketing”.
I understand that you want to sell your stuff and that but didn’t you already have the extensions submenu in the WooCommerce settings for that, for example?
It’s just that it’s a top level menu, taking up precious space in the administration of my WordPress!
Anyway, I won’t tell you any more, you know what it is, and you’ll be with me in that it’s completely unnecessary, so let’s get to the point.
If you want to remove that menu from there, just add this line of code at the end of the functions.php file of the active child theme, or else make a customization plugin and add it there:
add_filter( 'woocommerce_marketing_menu_items', '__return_empty_array' );
You’ll return your WordPress administration to its former glory, now if that annoyingly useless ‘Marketing’ menu
Read this post in Spanish: Cómo quitar el inútil, innecesario y molesto menú «Marketing» de WooCommerce