How does the product vendor filtering work?
Shopify allows to assign a product vendor to each product. This can be done in the Shopify product editing page:
You can limit the random recommendations displayed to products from the same vendor of the current product by enabling the following option in the Frequently Bought Together preferences page:
Let's say, for example, that you're seeing a product page whose vendor is ' Nike'. The random recommendations displayed will only be products from 'Nike'.
Please note that, if there are not enough products matching the selected criteria, the recommendations will be automatically completed using random recommendations.