If you missed the previous parts they can be found here: Building Microservices with Azure Kubernetes Service and Azure DevOps - Part 1 Building Microservices with Azure Kubernetes Service and Azu...
Updated Mar 11, 2019
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Building Microservices with Azure Kubernetes Service and Azure DevOps - Part 3
It's entirely possible that my explanations aren't clear enough here :)
Helm is basically an installer tool, and helm charts are the recipes for what you install. It is also often used for deploying third-party services (illustrated in part 4).
So when using Azure DevOps to deploy containers you can deploy either based on the Dockerfiles/docker-compose, or you can point it to helm-charts depending on your needs. For a non-public container with no relations to other containers it might not be necessary to use Helm other than standardizing.
The CD pipeline used above is using the helm chart we defined earlier. The other deployment is basically a remnant from testing I did without helm that was not included in the guide. (I should have deleted it to not clutter the view.)
