Product recommendations can work in a few different way: static, by keywords or dynamic. The static recommendations can be set by the company in the administration portal by item. These are items that our customers think their users would want to see with another item.
By keywords are items that have similar words associated with them. One can think of this scenario as a search like mechanism.
Dynamic recommendations are set by what we think your customers will want to see. The dynamic recommendations are specific to the individual and are personalized based on their unique shopping experience.
The below example your notice that the customer is asking for similar items to the USA Dog Ornament. Displayed are items they might be interested in.