Use glosarry for synopsis and improve introduction with active voice

Author: sobit02

content/en/docs/reference/kubectl/introduction.md

@@ -4,8 +4,8 @@ content_type: concept
 weight: 1
 ---
 
-kubectl is a command-line tool for interacting with Kubernetes clusters. It
-enables users to deploy applications, inspect resources, and manage workloads.
+kubectl is a command-line tool for interacting with Kubernetes clusters.
+Use it to deploy applications, inspect resources, and manage workloads.
 
 While this Book is focused on using kubectl to declaratively manage applications in Kubernetes, it
 also covers other kubectl functions.

content/en/docs/reference/kubectl/kubectl.md

@@ -6,7 +6,7 @@ weight: 30
 
 ## {{% heading "synopsis" %}}
 
-kubectl is a command-line tool used to interact with a Kubernetes cluster. It allows users to deploy applications, inspect and manage cluster resources such as pods, services, and deployments.
+{{< glossary_definition term_id="kubectl" length="short" >}}
 
 Find more information in [Command line tool](/docs/reference/kubectl/) (`kubectl`).