Update overview.md

Added a comma for easier reading.

Author: markojot

articles/governance/management-groups/overview.md

@@ -10,7 +10,7 @@ ms.author: timwarner
 
 If your organization has many Azure subscriptions, you may need a way to efficiently manage access,
 policies, and compliance for those subscriptions. _Management groups_ provide a governance scope
-above subscriptions. You organize subscriptions into management groups the governance conditions you apply
+above subscriptions. You organize subscriptions into management groups, the governance conditions you apply
 cascade by inheritance to all associated subscriptions.
 
 Management groups give you
@@ -323,4 +323,4 @@ To learn more about management groups, see:
 
 - [Create management groups to organize Azure resources](./create-management-group-portal.md)
 - [How to change, delete, or manage your management groups](./manage.md)
-- See options for [How to protect your resource hierarchy](./how-to/protect-resource-hierarchy.md)
+- See options for [How to protect your resource hierarchy](./how-to/protect-resource-hierarchy.md)