Add verbiage about regional availablitly for Engage (#4864)

Author: markzegarelli

src/engage/onboarding.md

@@ -14,6 +14,11 @@ This guide lists all required onboarding steps and walks you through Engage setu
 > info ""
 > The steps in this guide are only required if you plan to send email, SMS, and WhatsApp messages with Engage. Visit the [Engage Foundations Onboarding Guide](/docs/engage/quickstart) for general onboarding steps to set up your Engage space, connect sources, create audiences, and more.
 
+> info "Regional Segment"
+> You can use Engage Premier on [Segment's regional infrastructure in the EU](/docs/guides/regional-segment/). Twilio Engage ensures data residency in the EU, but the channels you connect to, may not guarantee the same level of data residency. Check directly with the providers of the channels you use for information about data residency in their applications. Native channels like email and SMS, which use Twilio, are not data resident. 
+> 
+> Twilio is GDPR compliant, and has [Binding Corporate Rules](https://www.twilio.com/legal/binding-corporate-rules){:target="_blank"} to ensure that data is protected when it's transferred between countries.
+
 ## Before you begin: overview and task checklist
 
 You’ll set up Twilio Engage in four stages:
@@ -233,7 +238,7 @@ To finish setting up your Messaging Service, you’ll now [configure an event we
 
 1. Switch to the browser tab or window with your Engage workspace.
 2. Navigate to **Engage > Engage settings > Channels**.  Under **SMS Service with Twilio**, click the **Get Started** button.
-3. The **Set up and valide your Twilio account** overlay appears (pictured below). Click the **Copy webhook URL** button. Your computer copies the URL to your clipboard.
+3. The **Set up and validate your Twilio account** overlay appears (pictured below). Click the **Copy webhook URL** button. Your computer copies the URL to your clipboard.
 
     ![Engage webhook URL](images/engagewebhook.png "Engage webhook URL")
 
@@ -285,6 +290,12 @@ You'll now create a messaging service to connect your number to Engage:
 
 Your WhatsApp messaging service is now created. 
 
+## Regional Segment
+
+You can use Engage Premier on [Segment's regional infrastructure in the EU](/docs/guides/regional-segment/). Twilio Engage ensures data residency in the EU, but the channels you connect to, may not guarantee the same level of data residency. Check directly with the providers of the channels you use for information about data residency in their applications. Native channels like email and SMS, which use Twilio, are not data resident. 
+
+Twilio is GDPR compliant, and has [Binding Corporate Rules](https://www.twilio.com/legal/binding-corporate-rules){:target="_blank"} to ensure that data is protected when it's transferred between countries.
+
 ## Next steps
 
 With configured accounts and services for all platforms, you’ve completed Engage onboarding and are ready to create and send campaigns to your users.

src/engage/quickstart.md

@@ -10,6 +10,9 @@ This guide walks you through the set up process for a simple Engage space, which
 > success ""
 > The first four steps in this guide also apply to Unify set up. To learn more, visit the [Unify Onboarding Guide](/docs/unify/quickstart).
 
+> info "Regional Segment"
+> Engage Foundations is available on Segment's regional infrastructure. For more information, see the article [Regional Segment](/docs/guides/regional-segment/).
+
 ## Engage configuration requirements
 > info ""
 > Engage requires both [Connections](/docs/connections/) and [Unify](/docs/unify/).