Strengthen the warning about reusing certificates in the yaml

installation and clarify the instructions.

site/content/en/docs/Installation/Install Agones/_index.md

@@ -4,4 +4,7 @@ linkTitle: "Install Agones"
 weight: 20
 description: >
   Install Agones in your existing Kubernetes cluster.
----
+---
+
+If you have not yet created a cluster, [follow the instructions]({{< ref "/docs/Installation/Creating Cluster/" >}})
+for the environment where you will be running Agones.

site/content/en/docs/Installation/Install Agones/yaml.md

@@ -6,24 +6,38 @@ description: >
   We can install Agones to the cluster using an install.yaml file.
 ---
 
-### Installing Agones
+## Installing Agones
 
 {{< alert title="Warning" color="warning">}}
-Installing Agones with the `install.yaml` will set up the TLS certificates
-stored in this repository for securing Kubernetes webhooks communication.
+Installing Agones with the `install.yaml` file will use pre-generated, well known TLS
+certificates stored in this repository for securing Kubernetes webhooks communication.
 
-If you want to generate new certificates or use your own for production workloads,
-we recommend using the [helm installation]({{< relref "helm.md" >}}).
+For production workloads, we **strongly** recommend using the
+[helm installation]({{< relref "helm.md" >}}) which allows you to generate
+new, unique certificates or provide your own certificates. Alternatively,
+you can use `helm template` as described [below](#customizing-your-install)
+to generate a custom yaml installation file with unique certificates.
 {{< /alert >}}
 
+Installing Agones using the pre-generated `install.yaml` file is the quickest,
+simplest way to get Agones up and running in your Kubernetes cluster:
+
 ```bash
 kubectl create namespace agones-system
 kubectl apply --server-side -f https://raw.githubusercontent.com/googleforgames/agones/{{< release-branch >}}/install/yaml/install.yaml
 ```
 
-To change the [configurable parameters](https://agones.dev/site/docs/installation/install-agones/helm/#configuration) in the `install.yaml` file, you can use helm directly to generate a custom file locally.
+You can also find the `install.yaml` in the latest `agones-install` zip from the [releases](https://github.com/googleforgames/agones/releases) archive.
+
+### Customizing your install
 
-The following example sets the `featureGates` and `generateTLS` helm parameters in `install.yaml`:
+To change the [configurable parameters](https://agones.dev/site/docs/installation/install-agones/helm/#configuration)
+in the `install.yaml` file, you can use `helm template` to generate a custom file locally
+without needing to use helm to install Agones into your cluster.
+
+The following example sets the `featureGates` and `generateTLS` helm parameters
+and creates a customized `install-custom.yaml` file (note that the `pull`
+command was introduced in Helm version 3):
 
 ```bash
 helm pull --untar https://agones.dev/chart/stable/agones-{{< release-version >}}.tgz && \
@@ -36,11 +50,8 @@ helm template agones-manual --namespace agones-system  . \
   --set agones.featureGates="PlayerTracking=true" \
   > install-custom.yaml
 ```
-Note: `pull` command was introduced in Helm version 3.
-
-You can also find the install.yaml in the latest `agones-install` zip from the [releases](https://github.com/googleforgames/agones/releases) archive.
 
-### Uninstalling Agones
+## Uninstalling Agones
 
 To uninstall/delete the `Agones` deployment and delete `agones-system` namespace:
 
@@ -51,7 +62,7 @@ kubectl delete -f https://raw.githubusercontent.com/googleforgames/agones/{{< re
 kubectl delete namespace agones-system
 ```
 
-Note: you should wait up to a couple of minutes until all resources described in `install.yaml` file would be deleted.
+Note: It may take a couple of minutes until all resources described in `install.yaml` file are deleted.
 
 ## Next Steps