Kubernetes is a system for running containerised applications reliably at scale. When your app grows from one server to many, someone has to decide where each piece runs, restart pieces that crash, and scale pieces up when traffic spikes. Kubernetes does all of that automatically.
Source: [Dev.to](https://dev.to/arhan_khan/kubernetes-for-beginners-run-your-apps-so-they-never-go-down-4gjj)