Update how-to-read-replicas-portal.md

Author: AlicjaKucharczyk

articles/postgresql/flexible-server/how-to-read-replicas-portal.md

@@ -131,15 +131,13 @@ The **Max Physical Replication Lag** metric shows the lag in bytes between the p
 2.	Select **Metrics**. In the **Metrics** window, select **Max Physical Replication Lag**.
 
     :::image type="content" source="./media/how-to-read-replicas-portal/metrics_max_physical_replication_lag.png" alt-text="Screenshot of the Metrics blade showing Max Physical Replication Lag metric.":::
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-    :::image-end:::
 
 3.	For your **Aggregation**, select **Max**.
 
 ### Read Replica Lag metric
 > Available only on replicas.
 
-The **Read Replica Lag** metric shows the time since the last replayed transaction on a replica. If there are no transactions occurring on your primary, the metric reflects this time lag.
+The **Read Replica Lag** metric shows the time since the last replayed transaction on a replica. If there are no transactions occurring on your primary, the metric reflects this time lag. For instance if there are no transactions occurring on your primary server, and the last transaction was replayed 5 seconds ago, then the Read Replica Lag will show 5 second delay.
 
 1. In the Azure portal, select read replica.