Helm

Helm is the “apt-get” of Kubernetes. It lets you define, install, and upgrade complex Kubernetes applications using charts — pre-configured packages of Kubernetes resources.

Instead of managing dozens of YAML manifests by hand (and inevitably getting the indentation wrong), you use a Helm chart with templated values. Need to deploy Redis? helm install redis. Need to customize it? Override the values. Need to roll back? helm rollback.

Why it matters: Helm charts are the standard way to share and deploy Kubernetes applications. They turn a pile of YAML into something manageable.