Example Concept: HTTP caching works by using headers like "Cache-Control," "ETag," and "Expires" to control the storage and retrieval of resources. When a client requests a resource, the server can specify how long the resource should be cached. If the resource is requested again within this period, the cached version is served, speeding up load times and reducing server requests. Conditional requests using "ETag" or "Last-Modified" headers ensure that the client receives updated data only when necessary, further optimizing performance.