Before you start
Things you need to know:
Every catalog has 2 rules in place by default:
Make sure you update to the latest version of your ecommerce connector and resync your product catalogs for this feature to work properly.
Set up catalog level rules
Go to Content > Products > Catalogs.
Select the Properties icon for the catalog you want to work with; the Edit insight properties panel appears.
Under the Product recommendations settings, for Recommendation rules, select Select; the Edit store rules panel appears.
Edit your recommendation rules.
This rules are inherited by the product recommendations in your catalog, which automatically happens once the rule logic is applied.