Cloudflare Workers is a serverless execution environment that allows developers to run JavaScript, WebAssembly, and other code directly on Cloudflare's global network of data centers. This means your code is deployed closer to your users, resulting in significantly lower latency and faster response times compared to traditional server-side deployments.

Instead of sending requests all the way to a centralized server, Workers intercept requests at Cloudflare's edge. This enables a wide range of use cases, from handling API requests and dynamic content generation to implementing authentication, A/B testing, and even entire web applications. The core idea is to distribute logic globally, making applications more performant, scalable, and resilient.

Workers are built on V8 Isolates, a lightweight and secure runtime that allows for rapid cold starts and efficient resource utilization. This makes them an excellent choice for applications that require high concurrency and responsiveness. Developers can leverage existing JavaScript knowledge and familiar tooling, making it easy to integrate Workers into their existing workflows.