docs: Self review of doc pages

docs/vantage/notification-channels.md

@@ -4,8 +4,8 @@ title: Notification channels
 sidebar_label: Notification channels
 ---
 
-A channel is a destination for alerts. [Monitors](./monitors.md) reference
-channels by ID, so one destination serves as many monitors as you like.
+A channel is a destination for alerts. One channel serves as many
+[monitors](./monitors.md) as you like.
 
 Manage them at **Settings → Notifications**.
 
@@ -64,9 +64,7 @@ Posts the alert as message content.
 
 Port `465` uses implicit TLS; anything else uses STARTTLS.
 
-Alert emails are rendered by the same email system that sends licence and
-account mail, so a monitor alert and an account email look like the same
-product.
+Alert emails look like the rest of the mail Vantage sends you.
 
 ## The message
 
@@ -83,9 +81,9 @@ something that needs to branch on status.
 ## Testing
 
 Every channel has a **Test** button. It dispatches a fabricated down event for a
-monitor called "Test monitor", through the real delivery path so a test that
-arrives proves the credentials, the network path and the destination, not just
-the configuration form.
+monitor called "Test monitor" and sends it the same way a real alert goes out, so
+a test that arrives proves the credentials, the network path and the destination
+as well as the form.
 
 :::tip Test after every change
 Channel settings are only exercised when something breaks, which is the worst