It depends which type of product recommendation you want to do. You can either focus on:
- Related products
- Bundled products
I’m a fan of cross-selling which can come in the form of frequently bought together, customers also bought, and showcasing products you’d like to promote to customers at the checkout with a discount.
To implement all of these cross-selling techniques, Sales Booster for WooCommerce will help. You’ll be able to use social proof to increase your average order value and therefore your store’s revenue.