Document email communication settings

src/tools/pontoon/users.md

@@ -29,6 +29,12 @@ In this section it’s possible to update the display name and other personal in
 * `Contact email address`: if provided, this will be displayed in the Profile page instead of the login email address.
 * `Bio`: a short text that will be displayed in the Profile page.
 
+### Email
+
+In this section it’s possible to update the display name and other personal information:
+* `Contact email address`: if provided, this email address will be used for email communications and displayed in the Profile page instead of the login email address.
+* `Email communications`: if enabled, you will get the latest updates about localization at Mozilla, announcements about new Pontoon features, invitations to contributor events and more.
+
 ### Appearance
 
 The user can chose between a light and dark combination of colors for Pontoon. There are three theme options available:
@@ -61,7 +67,7 @@ Pontoon can send internal notifications to users for specific events. All notifi
 
 For more information about this topic, refer to the page dedicated to [notifications](notifications.md).
 
-### Editor settings
+### Editor
 
 `Translation Toolkit Checks` (checks for number of sentences, placeholders, HTML tags, punctuation, etc.) are performed when saving a translation. For more information about quality checks, see [this document](translate.md#quality-checks).