Kubernetes rolling updates allow you to deploy new application versions without downtime. By incrementally replacing old Pods with new ones, the old Pods continue serving traffic until the replacements are ready. This mechanism maintains application availability, ensuring users don't experience interruptions during updates. The Deployment object manages these rolling updates, automatically creating new ReplicaSets when changes are made to the Pod template. To implement a rolling update, you first need to set up a Deployment. A basic example involves creating a Deployment manifest with three replicas of an Nginx container. After deploying this configuration using `kubectl apply`, you can trigger a rolling update by changing the image tag in the manifest. Kubernetes will create new Pods based on the updated configuration while keeping the old Pods running until the new Pods are ready. Advanced settings like `maxSurge` and `maxUnavailable` can be adjusted to control how many new Pods can be created and how many can be unavailable during the rollout. If an update causes issues, you can quickly roll back to a previous version using the `kubectl rollout undo` command. This triggers a new rollout that replaces the problematic configuration with the last known good version. You can also view the history of revisions and roll back to specific ones if needed. This flexibility makes managing application updates straightforward and efficient, ensuring that your services remain stable while delivering new features or fixes.