Add formal definition of workloads (#11302)

* Add formal definition of workloads

* Update workload.md

* add light copyedit

More section should not repeat short description. Both are served together on the built page.

content/en/docs/reference/glossary/workload.md

@@ -1,22 +1,24 @@
 ---
-title: Workload
-id: workload
-date: 2019-02-12
+title: Workloads
+id: workloads
+date: 2019-02-13
 full_link: /docs/concepts/workloads/
 short_description: >
-  A set of applications for processing information to serve a purpose that is valuable to a single user or group of users.
+   Workloads are objects you use to manage and run your containers on the cluster.
 
-aka:
+aka: 
 tags:
+- fundamental
+- core-object
 - workload
 ---
-A workload consists of a system of services or applications that can run to fulfill a
-task or carry out a business process.
+  Workloads are objects you use to manage and run your containers on the cluster.
 
-<!--more-->
+<!--more--> 
 
-Alongside the computer code that runs to carry out the task, a workload also entails
-the infrastructure resources that actually run that code.
+Kubernetes performs the 
+deployment and updates the workload with the current state of the application.
+Workloads include the DaemonSet, Deployments, Jobs, Pods, ReplicaSet, ReplicationController, and StatefulSet objects.
 
 For example, a workload that has a web element and a database element might run the
 database in one {{< glossary_tooltip term_id="StatefulSet" >}} of
@@ -24,5 +26,3 @@ database in one {{< glossary_tooltip term_id="StatefulSet" >}} of
 a {{< glossary_tooltip term_id="Deployment" >}} that consists of many web app
 {{< glossary_tooltip text="pods" term_id="pod" >}}, all alike.
 
-The organisation running this workload may well have other workloads that together
-provide a valuable outcome to its users.