The classic role for Marketing is Inbound campaigns to generate inbound leads by having phone numbers, Calendly links and webform for prospects to 'raise their hand.' For most companies, these efforts do not generate enough leads, so Sales Reps hit the phones.
These three roles assist Sales Reps in different ways; all of which are focused on generating more conversations.
Email Blast and Scoring
Prospecting Drip
Direct Mail Infused Prospecting
Integrated email marketing with scoring and direct mail tools creates awareness and mindshare, provide valuable data, and raise the temperature of a cold call to a call that is a little warmer. 
Provides the basic support services to Reps:
Is satisfactory overall and can provide scoring data to the Reps call list and can implement a Prospecting Drip campaign. Or, these features would not be useful to Reps.
Would be circumstances where parts of your Marketing needs would be best served by ContactScience®.