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Caching Headers and 's-maxage'
This chapter discusses normal caching headers in web development, specifically 's-maxage' and 'stale-while-revalidate'. It explains their usage in caching assets at both the CDN and browser level, as well as the concept of serving stale content while revalidating. The speakers caution against universal application of 'stale while revalidate' and highlight limitations in scenarios such as real-time messaging apps.