Traffic quality depends on intent. Search visitors, subscribers, partners and paid-media audiences should not all be pushed into the same page with the same message.
Traffic strategy
Map the source to a page that matches what the visitor already knows. Informational search should usually enter through useful education; comparison and pricing intent can enter closer to the decision.
Email follow-up
The first job of follow-up is to fulfill the promise made before the opt-in. Then education, objection handling and a relevant offer can follow.
Measurement
Use campaign parameters and meaningful funnel events so channel decisions are based on downstream outcomes rather than raw clicks.