How does the product recommendation tool work in Zoho Campaigns?

How does the product recommendation tool work in Zoho Campaigns?

Connecting your online store to Zoho Campaigns imports all products and
customer purchase histories. The product recommendation engine then analyzes this
data, using algorithms to suggest personalized, relevant products to each customer
based on their past purchases. The product recommendation engine allows you to narrow the selection from all of the products in your store and only recommend products that are relevant to each customer.