Use custom objects in Marketo to track metrics specific to your business. This could be anything from cars, to college majors–-whatever your company sells or services.
In the tree, select Database Management > FIeld Management and in the Marketo Custom Objects tab, click New Custom Object.
Enter a display name. The API Name and Plural Name populate automatically, but you can edit them. Enter a description (optional).
Slide the Show in Lead Detail to display Show if you want to view custom objects in the Lead page. Click Save.
The custom object information displays. Notice that it's in a Draft state and no fields, object names, or field names are linked to the custom object yet.