This presentation explores virtualization, a technique for rendering only the visible data in large lists or grids, as a solution to performance challenges in React applications. We'll delve into how to virtualize from scratch, as well as some of the best libraries that aid in implementing virtualization, showcasing through practical examples how this technique significantly boosts performance in real-world applications. Attendees will learn how to optimize React applications for large datasets, ensuring a smooth user experience regardless of the scale of data being handled.