通过智能定位探索内容,平衡推荐质量与平台收益。
Where to Explore: A Reach and Cost-Aware Approach for Unbiased Data Collection in Recommender Systems
- 基于覆盖范围和机会成本优化探索内容的投放位置。
- 在超1亿月活平台测试中,保持观看时长不变。
- 适合关注长期推荐效果与业务指标平衡的从业者。
探索对提升长期推荐质量至关重要,但在以被动观看为主的远程首播电视环境中,常损害短期业务表现。本文提出一种安全高效的逐内容探索方法,通过优化其投放位置来降低机会成本。在拥有超过100万月活跃用户的大型流媒体平台上,该方法识别出低参与度的滚动深度区域,并战略性引入名为“完全不同的内容”(Something Completely Different)的随机内容容器。探索不统一部署于整个用户界面,而是仅出现在实证证明低成本、高覆盖的区域,从而最小化对平台整体观看时长目标的影响。大规模A/B测试显示,该策略在维持商业指标的同时,成功收集了无偏交互数据。该方法补充了现有的行内多样性与基于强化学习的探索技术,提供了一种可部署、行为驱动的大规模探索内容曝光机制。此外,将收集到的无偏数据用于下游候选生成后,显著提升了用户参与度,验证了其在推荐系统中的价值。
原文摘要 · Abstract (English)
Exploration is essential to improve long-term recommendation quality, but it often degrades short-term business performance, especially in remote-first TV environments where users engage passively, expect instant relevance, and offer few chances for correction. This paper introduces an approach for delivering content-level exploration safely and efficiently by optimizing its placement based on reach and opportunity cost. Deployed on a large-scale streaming platform with over 100 million monthly active users, our approach identifies scroll-depth regions with lower engagement and strategically introduces a dedicated container, the "Something Completely Different" row containing randomized content. Rather than enforcing exploration uniformly across the user interface (UI), we condition its appearance on empirically low-cost, high-reach positions to ensure minimal tradeoff against platform-level watch time goals. Extensive A/B testing shows that this strategy preserves business metrics while collecting unbiased interaction data. Our method complements existing intra-row diversification and bandit-based exploration techniques by introducing a deployable, behaviorally informed mechanism for surfacing exploratory content at scale. Moreover, we demonstrate that the collected unbiased data, integrated into downstream candidate generation, significantly improves user engagement, validating its value for recommender systems.
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