Need more clarification for the questions -
Shopping recommendation for what? 1. For Google store 2. Shopping recommendation as an API for business 3. A bot as shopping recommender.
Google Store:
What is the primary goal? The primary metric is likely the total transaction volume. Secondary metrics are the number of items sold per transaction and the average dollar amount of a sale.
If the number of items sold per transaction is improved then the volume also increases. So, the shopping recommender will help here.
Customer Journey:
1. In the market to buy a Nest. Searches on Google and lands on Google store
2. Google already has search history of a user. If in the past if the user has searched for Google hub, the store can recommend - "Based on your past searches, we recommend"
3. If there is no search history, then Google can use collaborative filtering recommendation. It can say something like - "People similar to your buying preferences have purchased.."
