JavaScript, while traditionally single-threaded, can leverage web workers to perform background processing on the web, alleviating the main thread from heavy tasks and thus improving user experience. This approach involves creating a worker object that runs a separate JavaScript file in a different global context, which can be cumbersome to implement due to the interaction ceremony required. The blog post demonstrates using Google's Comlink library to simplify this process by providing an RPC-like interface for web workers, enhancing performance in applications like React by offloading long-running tasks such as mathematical calculations to worker threads. The example involves setting up a TypeScript web application using create-react-app, integrating Comlink and worker-plugin to manage the worker setup, and eventually implementing a React component that uses a custom hook to perform calculations in a web worker, thereby keeping the UI responsive. Additionally, the post touches on configuring Webpack for worker integration and emphasizes the potential for reusable worker hooks, showcasing a practical application of web workers in modern web development.