Default for Frequently Bought Together

1. Default product:

• Set below the rules

• None

• Related

• Upsells

• Related & Upsells

• Set below rules

After setting below the rules, you can set more information for:

• Bad keywords:

  When you choose set below the rules, you should set bad keywords to add frequently bought together.

• Allow category: Choose category you want to add related products

• Number of default products:

And:

• Sort by: Product name/ID

• Sort order: Ascending/Descending

• Mapping categories: Category, Map to category

• Add new mapping

Atfer fullfilling all information, click "Save" for your setting.

You've set already for default Bought Together for WooCommerce. Hope that this blog will help you well.