This blog post details how Airbnb enhanced its search ranking system by introducing Push Mode and Near-real-time (NRT) Model Transform capabilities into Chronon, allowing for instant updates to search results based on a guest's recent activity rather than relying on a nightly batch process. The improvements led to significantly reduced latency in search result freshness and increased ranking quality, evidenced by a measurable boost in booking rates and a notable increase in Normalized Discounted Cumulative Gain (NDCG).