Important Tip #1: Make the Group name as generic as Possible so it can be used across as many products as possible:
- Each different group is a separate meta_key in
woocommerce_order_itemmeta so the more of these different options the more back end work
Tip#2: If the same options are across multiple products be sure to name the group and options identically, (this helps with later reporting)
- as for Tip 1, reduces back end work