Email marketing is a sort of direct marketing under the digital marketing umbrella that relates to sending promotional messages to prospects and customers. An Effective email marketing campaign can convert prospects into customers, and turn one-time buyers into regular and loyal customers.

Challenges
Earning New Subscribers
Low Delivery Rate
Low Open Rate
Low Click-Through Rate
High Unsubscribe Rate
High SPAM Complaints
Low Active Ratio
Limited Post-Click Activity
Achieving Measurable ROI
Data Quality
Marketing Costs