co-occurrence. It's the real backbone of almost all recommender systems. This is the same way YT/TikTok does it btw. Co-occurrence is king in recommender syste

co-occurrence. It's the real backbone of almost all recommender systems. This is the same way YT/TikTok does it btw. Co-occurrence is king in recommender systems in production. It's extremely cheap to calculate and by far the most effective method.