Fastly is a content delivery network (CDN) that offers a range of features to improve the performance, reliability, and security of websites and applications. Here are some of Fastly's key features:

1. Content Delivery: Fastly's content delivery network is designed to ensure that content is delivered quickly and reliably to users around the world. Fastly uses a globally distributed network of edge servers to cache content and reduce latency. This results in faster page load times and a better user experience.
2. Edge Computing: Fastly's edge computing platform allows developers to run code at the edge of the network, closer to end users. This can improve performance and reduce round-trip times for requests. Edge computing can also be used to build serverless applications and perform real-time processing of data at the edge.
3. Security: Fastly offers a range of security features to protect websites and applications from attacks. These include DDoS protection, Web Application Firewall (WAF), and TLS/SSL encryption. Fastly's security features are designed to be easy to use and configure, making it simple for developers and IT teams to implement strong security measures.

Overall, Fastly's features are designed to help websites and applications perform better, be more reliable, and be more secure. With its global network and edge computing platform, Fastly is well-suited for high-traffic sites and applications that require fast response times and strong security measures.