Create a Salesforce Marketing Cloud connection to connect to Salesforce Marketing Cloud. Use the connection to read data from and write data to Salesforce Marketing Cloud. Use Salesforce Marketing Cloud connection as a source connection object when you read records from Salesforce Marketing Cloud. Use Salesforce Marketing Cloud connection as a target connection when you write or update data to Salesforce Marketing Cloud.
You create a Salesforce Marketing Cloud connection on the Connections page. You can then use the connection in the Synchronization Task wizard when you create a task.