Merge pull request #4719 from ianabels/patch-21

Specify Subscription Group Type

_docs/_user_guide/message_building_by_channel/email/preference_center/preference_center.md

@@ -19,7 +19,7 @@ To place a link to the preference center in your emails, use the following Liqui
 ```
 {% endraw %}
 
-This will show the basic preference center layout that lists all of the subscription groups automatically.
+This will show the basic preference center layout that lists all of the email subscription groups automatically.
 
 {% alert note %}
 The preference center has a checkbox that will allow your users to unsubscribe from all emails. Note that you will not be able to save these preferences if sent as a test message.
@@ -62,4 +62,4 @@ Use a [JSON web token](https://auth0.com/learn/json-web-tokens/) to authenticate
 
 ### Logo
 
-To edit the logo in your email preference center, select the <i class="fas fa-cog"></i> gear icon and click **Edit**.
+To edit the logo in your email preference center, select the <i class="fas fa-cog"></i> gear icon and click **Edit**.