According to @GoogleResearch, slides and a video from their WSDM 2009 presentation reveal how Google's search system evolved by incorporating early AI and machine learning techniques. The presentation details the transition from rule-based ranking to learning-to-rank algorithms, which improved search relevance and laid the foundation for AI-powered search features still in use today (source: static.googleusercontent.com, videolectures.net). For AI-focused businesses, the talk underscores the transformative impact of machine learning on search technology, highlighting commercial opportunities in search optimization, AI-driven content ranking, and natural language processing solutions.