Step 1: In the Connectors view, select the Marketo connection tile
Step 2: Select add a new Account
Step 3: Enter the Marketo connection information. See this article for more details on getting information from Marketo.
Step 4 (Optional): Map the fields from D&B Lattice to Marketo
Step 5: Verify the Marketo Connector tile appears in D&B Lattice
You are now ready to launch campaigns to Marketo!