CloudFlare is service it provides a content delivery network, Internet Security services and distributed domain name server services, sitting between the visitor and the CloudFlare user's hosting provider, acting as a reverse proxy for websites.
CloudFlare Features:
DDOS Protection - Ensure your website is protected against DDoS attacks using our advanced service.
Web Application Firewall - Protect your website from online threats with our enterprise-grade Website Application Firewall (WAF).
DNS - CloudFlare operates one of the fastest DNS services. It is global, powerful, and always secure.
CDN - Distribute your content around the world so it’s closer to your visitors (speeding up your site).
CloudFlare Apps - CloudFlare apps makes installing web apps on your site fast, safe and one-click simple.
CloudFlare Advantages:
-Site Performance Improvement
-Mobile Device Optimization
-Bot and Threat Protection
-Spam Comments Protection
-Alerting Visitors of Infected Computers
-Offline Browsing Mode
-Lower Resource Usage
-New Site Stats
-CloudFlare Apps
-SSL Support

