- Call-to-Action (CTA)
- Card-Sorting
- Click Rate
- Click-Through-Rate
- Community / Online-Community
- Content
- Content First
- Content-Marketing
- Contextual Inquiry (Kontextanalyse)
- Contextual Targeting
- Conversion
- Conversion Rate
- Cookies
- Corporate-Blog
- Cost per Click (CPC)
- Cost per Lead (CPL)
- Cost per Mille (CPM)
- Cost per Order (CPO)
- CPX
- Crawler
- CRM-Targeting
- CRO (Conversion Rate Optimierung)
- CSS3
- Customer Journey
- Customer-Relationship-Management (CRM)
- Customer-Relationship-Management-Systeme
