In practice
Put static assets on it first, then consider caching HTML at the edge once invalidation is under control.
Check that the CDN is not stripping or rewriting headers that SEO depends on — canonical, hreflang, status codes.
Why it matters
Distance is pure latency, and a CDN is the only way to remove it for an international audience.
It also absorbs traffic spikes that would otherwise take the origin down during a campaign.
Related terms