CDN Caching
Definition
CDN caching stores copies of responses at edge locations so users and bots receive content from nearby servers instead of only the origin.
By Vinespire Editorial Team, Editorial ·
This term is part of the full AI search glossary.
Full definition
A content delivery network caches static assets and often HTML according to Cache-Control, CDN rules, and purge policies. Hits reduce origin load and latency; misses forward to origin. Incorrect cache keys can serve the wrong variant (logged-in vs public, locale, A/B).
SEO-sensitive mistakes include caching error pages as 200, serving stale noindex HTML, or personalizing public URLs without vary rules. Purge on publish so lastmod-worthy updates propagate quickly.
Faster, consistent public HTML helps Core Web Vitals and reliable fetches by search and AI crawlers. See Edge Worker, LCP, and lastmod.