Query Rewards: Building a Recommendation Feedback Loop During Query Selection

Query Rewards: Building a Recommendation Feedback Loop During Query Selection

摘要

In Homefeed, ~30% of recommended pins come from pin to pin-based retrieval. This means that during the retrieval stage, we use a batch of query pins to call our retrieval system to generate pin recommendations. We typically use a user’s previously engaged pins, and a user may have hundreds (or thousands!) of engaged pins, so a key problem for us is: how do we select the right query pins from the user’s profile?