How Instagram suggests new content

This post introduces 'Suggested Posts' for Instagram, a new feature that aims to provide personalized content recommendations from accounts the user doesn't currently follow, while maintaining a 'Feels Like Home' experience. It details the system's two-stage design (candidate generation and selection), the use of embeddings and co-occurrence for candidate generation, methods for addressing the cold-start problem, and the ranking model based on engagement and aversion factors. The 'Feels Like Home' principle is further elaborated through prioritization of Home Feed-like sources, similar freshness heuristics, and media type mixture.