I don't really care how they're computed, right? All I want is someone to tell me where to eat and be good at it.
It could be based on my preferences, and how I've rated things before, it could be based on social data, it could be based on a conversation with a chatbot. It could be a combination of all of the above.
The way the information is derived is really unimportant, the important thing is that I am happy with where you tell me to go.