another update

Author: joe-ayoub-segment

src/connections/destinations/catalog/actions-sendgrid/index.md

@@ -21,19 +21,22 @@ id: 631a6f32946dd8197e9cab66
 
 {% include components/actions-fields.html %}
 
-## Using the 'Send email with Dynamic Template' Action 
+## Additional details for the 'Send email with Dynamic Template' Action 
 
-### Capabilities
-This Action can be used to send emails to Contacts in Sendgrid using [Sendgrid Dynamic Templates](https://www.twilio.com/docs/sendgrid/ui/sending-email/how-to-send-an-email-with-dynamic-templates). The Dynamic Template being used must already exist in Sendgrid. Use the Action field named 'Dynamic Template Data' to populate values in the Dynamic Template. 
+### Usage
+The 'Send email with Dynamic Template' Action can be used to send emails via Sendgrid using [Sendgrid Dynamic Templates](https://www.twilio.com/docs/sendgrid/ui/sending-email/how-to-send-an-email-with-dynamic-templates). The Dynamic Template being used must already exist in Sendgrid. Use the Action field named 'Dynamic Template Data' to populate values in the Dynamic Template. 
 
-### Contacts are not required
-Emails will be sent to the specified email address even if it is not listed as a Contact in SendGrid Marketing Campaigns.
+### Contacts
+Emails will be sent to the specified email addresses, even if they are not listed as Contacts in SendGrid Marketing Campaigns.
 
-### Sendgrid API Key permissions
+### Sendgrid API Key
+Segment and SendGrid recommend defining the SendGrid API key within a subuser account and ensuring the domain being used is authenticated under that same subuser account. The 'Send email with Dynamic Template' Action requires the Sendgrid API Key to have the following scopes assigned:   
+1. Category Management: full
+2. IP Management: full
+3. IP Management: full
+4. Template Engine: full
 
-TODO - Dustin to explain what types of permissions the API Key needs here
-
-## Using the 'Upsert Contact' Action 
+## Additional details for the 'Upsert Contact' Action 
 
 ### Recording Custom User Traits
 If you want to view any other custom user traits in the Marketing Campaigns list dashboard, you must create a [Custom Field inside Marketing Campaigns’s UI](https://docs.sendgrid.com/ui/managing-contacts/custom-fields#creating-custom-fields){:target="_blank"} of the traits in your identify calls. Note that you do not need to map all user.traits you are sending inside Marketing Campaigns. You only need to create Custom Fields of the traits you want to see in your list view.
@@ -45,3 +48,7 @@ For any other custom traits just add a Custom Field inside of SendGrid Marketing
 
 ### Recording userId
 To record a Segment userId in SendGrid Marketing Campaigns, you must pass the userID as a trait on your identify() calls. SendGrid does not automatically map the Segment userID to any Marketing Campaigns properties.
+
+### Sendgrid API Key
+The 'Upsert Contact' Action requires the Sendgrid API Key to have the following scopes assigned:
+1. Marketing: full