Update pod.md (#4764)

* Update pod.md

update pod desc

* Update pod.md

* edit

docs/concepts/workloads/pods/pod.md

@@ -13,8 +13,8 @@ managed in Kubernetes.
 ## What is a Pod?
 
 A _pod_ (as in a pod of whales or pea pod) is a group of one or more containers
-(such as Docker containers), the shared storage for those containers, and
-options about how to run the containers.  A pod's contents are always co-located and
+(such as Docker containers), with shared storage/network, and a specification 
+for how to run the containers.  A pod's contents are always co-located and
 co-scheduled, and run in a shared context.  A pod models an
 application-specific "logical host" - it contains one or more application
 containers which are relatively tightly coupled — in a pre-container