I was on the right path, will explain solution below:
<?php
// THE IF IS OPTIONAL!! It checks if the url contains 'wp-admin'
//if true, it doesn't run the code, because while using Elementor, if the code is ran it throws errors and doesn't let me inside the editor
if (strpos($_SERVER['REQUEST_URI'],'wp-admin') === false) {
global $product;
$product_brand = get_the_terms( $product->get_id() , 'yith_product_brand');
echo $product_brand[0]->description; //had to use [0], because get_the_terms returns an array
}
?>
