- Crossmedia
- Cross Selling
- Crowdfunding
- Crowdsourcing
- CSAT
- Customer Centricity
- Customer Engagement
- Customer Experience
- Customer Journey
- Customer Life Cycle
- Customer Lifetime Value
- Customer Retention Management
- D2C
- Dialogmarketing
- Dienstleistungsmarketing
- Digital Natives
- Direktmarketing
- Direktvertrieb
- Display Marketing
- Duplicate Content