K3s

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A placeholder that keeps your resources organized and separate. It helps you manage different projects or environments within the same cluster without them interfering with each other. 

 A blueprint for your applications. It defines how many copies of your app should run, how to update them, and what to do if something goes wrong. With deployments, you can easily roll out new versions, scale up or down, and ensure your app is always running smoothly. 

PV/PVC  work together to manage storage. A PV is like a storage unit in your cluster, set up and ready to store data. It's a resource that you can use to keep your data safe and accessible. On the other hand, a PVC is like a request for storage from your application. When your app needs storage, it makes a claim (PVC) specifying how much space and what type of storage it needs.  

For managing how your applications communicate within the cluster and with the outside world. A service in Kubernetes is like a stable endpoint that your applications can use to talk to each other, even if the underlying pods change. Using kubectl, you can create, update, and manage these services easily.