Netlify's Jason Lengstorf discussed the Jamstack, a decentralized architecture that enables building dynamic applications on static sites. The Jamstack allows for decoupling of front-end and back-end code, making it easier to deploy and manage applications. CDNs are resilient against DDoS attacks, as they cache content and reduce the load on servers. Serverless functions can be used for tasks like websockets, real-time notifications, and GraphQL subscriptions, but not for complex tasks that require a backend server. Netlify's On-demand Builders feature speeds up builds of large sites by only rendering necessary pages at runtime, reducing build times. The feature also allows for caching and automatic deployment of changes. Jason demonstrated the use of serverless functions on Netlify to quickly set up an API for grabbing DEV posts with the DEV API.