A global CDN, DNS and security platform that sits in front of websites to speed and protect them.
Official siteCloudflare is a global network that sits between visitors and your origin server, acting as a content delivery network (CDN), DNS provider, reverse proxy and security layer. It caches content close to users, absorbs DDoS attacks, filters malicious traffic with a web application firewall, and terminates SSL — improving both speed and resilience.
It is one of the most widely used platforms on the web, with a genuinely useful free tier. That reach is also a concern people raise: routing a large share of the internet through one provider centralises risk, and a Cloudflare outage takes many sites down at once. Its edge-compute product, Workers, has also grown into a serious platform for running code at the edge.
Cloudflare proxies traffic through its global edge to accelerate, secure and control delivery.
Cloudflare is the infrastructure layer in front of everything else. For SEO it matters because faster delivery helps Core Web Vitals (which PageSpeed Insights measures) and stable uptime protects crawl access. Sitting at the edge, it also affects how bots and crawlers reach the site, so its settings interact directly with technical SEO.
Strength: massive global network, strong free tier, solid security, and real speed gains from edge caching. Limit: aggressive caching or security rules can accidentally block legitimate crawlers or serve stale content; correct configuration matters. Centralisation is a real trade-off — when Cloudflare has an outage, a large slice of the web goes down with it, and advanced features sit behind paid tiers.
On builds we host or manage, we use Cloudflare for CDN, DNS and SSL, tuning cache and firewall rules so real users get speed while Googlebot and other crawlers are never blocked. We check its settings during technical audits because a misconfigured edge is a common, hidden cause of crawl and performance issues.
Google's free tool for measuring page performance and Core Web Vitals in the lab and the field.
Google's free reporting on how your site performs in Google Search and how Google crawls and indexes it.
A desktop crawler that scrapes a website like a search engine to expose technical SEO issues.
Common questions
Straight answers on how this fits your marketing and build.
Indirectly, yes. Faster delivery via its CDN supports Core Web Vitals, and reliable uptime keeps the site crawlable. It is not a ranking factor itself, but poor configuration can harm crawling and speed.
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