- Bandwidth
- Behavior-Based Marketing Automation
- Blog
- Blogger
- Blogosphere
- Boardreader
- Bookmark
- Bounce Rate or Exit Rate
- Brand Advocates
- Brand Awareness
- Broken Links
- Browser
- Budget Authority Need Timeline (BANT)
- Business Development Representative (BDR)
- Business to Business (B2B)
- Business to Consumer (B2C)
- Buyer Persona