Add descriptions for SEO.

Author: TimShererWithAquent

docs/database-engine/database-mirroring/add-or-replace-a-database-mirroring-witness-sql-server-management-studio.md

@@ -1,6 +1,6 @@
 ---
 title: "Add or replace a mirror witness (SSMS)"
-description: Learn how to add or replace a database mirroring witness using SQL Server Management Studio if the database mirroring endpoints use Windows Authentication.
+description: Learn how to add or replace a database mirroring witness using SQL Server Management Studio when the database mirroring endpoints use Windows Authentication.
 ms.custom: seo-lt-2019
 ms.date: "03/07/2017"
 ms.prod: sql

docs/database-engine/database-mirroring/database-mirroring-and-full-text-catalogs-sql-server.md

@@ -1,6 +1,6 @@
 ---
 title: "Database mirroring and full-text catalogs"
-description: Describes how to configure a database mirror on a database that has a full-text catalog. Learn about indexes before and after failover.
+description: Learn how to configure a database mirror on a database that has a full-text catalog and about indexes before and after failover.
 ms.custom: "seo-lt-2019"
 ms.date: "03/03/2017"
 ms.prod: sql

docs/sql-server/failover-clusters/windows/recover-from-failover-cluster-instance-failure.md

@@ -1,6 +1,6 @@
 ---
 title: "Recover from failover cluster instance failure"
-description: Describes how to recover from a failover of a failover cluster instance by using the Failover Cluster Manager snap-in after a failover occurs in SQL Server.
+description: Learn how to recover from a failover of a failover cluster instance by using the Failover Cluster Manager snap-in after a failover occurs in SQL Server.
 ms.custom: "seo-lt-2019"
 ms.date: "03/14/2017"
 ms.prod: sql

docs/sql-server/failover-clusters/windows/upgrade-a-sql-server-failover-cluster-instance.md

@@ -1,6 +1,6 @@
 ---
 title: "Upgrade a failover cluster instance"
-description: "Learn how to upgrade a SQL Server failover cluster instance using installation media. Learn about a rolling upgrade and upgrading a multi-subnet cluster." 
+description: "Learn how to upgrade a SQL Server failover cluster instance using installation media. Learn about rolling upgrades and upgrading a multi-subnet cluster." 
 ms.custom: "seo-lt-2019"
 ms.date: "11/21/2019"
 ms.prod: sql

docs/sql-server/failover-clusters/windows/view-and-read-failover-cluster-instance-diagnostics-log.md

@@ -1,6 +1,6 @@
 ---
 title: "View & read failover cluster instance diagnostic log"
-description: Learn how to view and read the running diagnostic log produced by the SQL Server failover cluster instance.
+description: Learn how to view and read the running diagnostic log produced by a SQL Server failover cluster instance.
 ms.custom: seo-lt-2019
 ms.date: "03/04/2017"
 ms.prod: sql

docs/sql-server/failover-clusters/windows/view-cluster-quorum-nodeweight-settings.md

@@ -1,6 +1,6 @@
 ---
 title: "View Cluster Quorum NodeWeight Settings | Microsoft Docs"
-description: Learn how to view NodeWeight settings for each member node in a Windows Server Failover Clustering cluster, which are used during quorum voting.
+description: Learn how to view NodeWeight settings for each member node in a Windows Server Failover Clustering cluster. These settings are used during quorum voting.
 ms.custom: ""
 ms.date: "03/14/2017"
 ms.prod: sql