Content Delivery Network
A distributed network of edge servers that caches and serves content close to users, reducing latency and offloading the origin.
Technical
Edge SEO
Implementing SEO changes in CDN edge workers rather than the origin application, so fixes ship without touching the main codebase or release cycle.
In full
Edge workers can inject or rewrite title tags, canonicals, hreflang and structured data, serve redirect maps, modify robots.txt, add security headers, and route crawlers to prerendered HTML. The appeal is speed on platforms where engineering capacity is the bottleneck; the risk is a hidden layer of logic that drifts from the origin and confuses future debugging. Changes should be version-controlled and documented like any other deployment.
Example
A team ships a 12,000-entry redirect map as a Cloudflare Worker two days after a migration, while the origin backlog is six weeks long.
Related terms
301 redirect
A server-side permanent redirect that tells crawlers a URL has moved for good and that ranking signals should consolidate on the…
Prerendering
Generating and caching a fully rendered HTML snapshot of a JavaScript page at build time or on request, so crawlers receive complete markup.
Site migration
Any change to a site's domain, URL structure, platform, template or content organisation that materially affects how search engines see it.
Cache-Control
The HTTP header governing how browsers, CDNs and proxies store and revalidate a response, using directives such as max-age, s-maxage and…