Query Activity

https://help.salesforce.com/s/articleView?id=sf.mc_as_using_the_query_activity.htm&type=5

Wait Activity

https://help.salesforce.com/s/articleView?id=sf.mc_as_wait_activity.htm&type=5

OAuth API Integration

https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/integration-considerations.html

SMS/MMS Content

https://help.salesforce.com/s/articleView?id=sf.mc_moc_message_content_considerations.htm&type=5

• Nested functions are calculated from the inside out.

• Commas are not permitted in numeric constants.

• Alternative quote characters, such as smart quotes, are not permitted in string constants.

• Be careful using null. An empty string (for example "") or a zero value (0) is not the same as null.

• Review spacing. The system views spaces as two different attributes. For example, First Name would search for a data field named "First" instead of "First Name."

• The lookup function only returns a single value. If the criteria used in the lookup function matches multiple records, the function returns the first found value, regardless if more values exist.

• Certain functions are not intended for send time use with high volume. These include EncryptSymmetric,CreateSalesforceObject, and InsertDE functions.