Google's Jeff Dean emphasized the importance of index freshness in AI services, which enables real-time data updates compared to competitors like OpenAI. Delip Rao highlighted that closed LLMs often use outdated indexes, leading to stale content and 404 errors. Ben Kaufman acknowledged the complexity in achieving freshness in retrieval and ranking processes. The historical Caffeine update in 2009 greatly improved Google's speed in serving fresh content. Despite Google's lead in index freshness, competitors, particularly OpenAI, have significant financial resources to advance their capabilities.
Index freshness is something I and many others at Google have worked on for many years.
As a result, you may occasionally encounter 404 links, which can tarnish the reputation of your downstream app.
Freshness retrieval and ranking is also very challenging. Have been doing some work in this area and still a lot more to be done!
Google is super good at getting fresh content - like it or not - and it uses that within Google AI Overviews, AI Mode and other Google services.
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