Cloudflare is a web infrastructure and security company that provides services to enhance website performance and protect against online threats. Acting as a content delivery network (CDN), it caches website content on multiple servers worldwide, improving load times for users. Cloudflare also offers security features like DDoS protection, a web application firewall (WAF), and SSL encryption. These tools help businesses optimize website speed, maintain uptime, and safeguard against cyberattacks, improving user experience.