+1 to custom fields and objects within SFDC. You can also use SFDC campaigns to track event participation and speakers, for example. From there, it’s quite easy to build simple dashboards in SFDC. And if your Marketo is integrated with SFDC, you can use its Bizible attribution model to track influenced revenue. The simplicity and speed of all this always depend on your SFDC team’s availability and willingness to help 😅
