Accurate reporting for return on investment (ROI) for marketing campaigns has never been easier.
To identify only the new Leads in a Salesforce report which were created by web form submissions or lists imported, set the RingLead field action for any field to "Do Not Update" for matching Leads. If RingLead finds a matching Lead, this field would not be updated. However, if RingLead created a new Lead, this field would contain the value submitted in the web form.
A report can be created to identify these new Leads created by setting the criteria for this field in the Salesforce report to "not equal to blank". This will filter out any Leads or Contacts that were already in Salesforce before the campaign began.