Merge pull request segmentio#6487 from segmentio/SRC-3964

Update Marketo source with Default Activity Type IDs

Author: cmastr

src/connections/sources/catalog/cloud-apps/marketo/index.md

@@ -27,7 +27,7 @@ You will need Admin permissions to your Marketo account.
 ![Screenshot of the set up flow for the Marketo source.](images/add-source.png)
 
 > warning "Lead Activity Type IDs"
-> In Marketo's settings, the Lead Activity Type IDs field is labeled as optional, but is required to see the `lead_activities` table. Segment recommends that you complete this field to see all available data.
+> In Marketo's settings, the Lead Activity Type IDs field is labeled as optional, but is required to see the `lead_activities` table. Segment recommends that you complete this field to see all available data.  By default the activity type IDs 12,13,32,37 are used to sync data to the `leads` table and `leads_activity_attributes` table.
 
 
 ### Configure your Marketo source
@@ -303,4 +303,4 @@ You first need to enable the **Activity Type IDs (optional)** setting in the Mar
 
 Yes. For `leads` and `activities`, choose **Custom Lead Fields (optional)**, which lets you enter comma-separated custom files that will be synced by Marketo's REST API name.
 
-View [Marketo's List of Standard Fields documentation](http://developers.marketo.com/rest-api/lead-database/fields/list-of-standard-fields/){:target="_blank"} for a complete list of standard fields and Marketo's REST API names. [Reach out to Segment support](https://segment.com/help/contact/){:target="_blank"} if you're interested in other fields.
+View [Marketo's List of Standard Fields documentation](http://developers.marketo.com/rest-api/lead-database/fields/list-of-standard-fields/){:target="_blank"} for a complete list of standard fields and Marketo's REST API names. [Reach out to Segment support](https://segment.com/help/contact/){:target="_blank"} if you're interested in other fields.