Business Promotion Social Media Platform

I need a focused and dynamic social media platform. The overarching goal of this platform is to effectively promote businesses of various scales. With user engagement as a key driving factor for the design, there's a primary feature on top of my list:
- User Tagging Capabilities: This will foster interactive discussions, indirectly promoting various businesses in a very subtle yet dynamic manner.
The platform won't have user profiles, a newsfeed or messaging features, and it will be solely targeted at business promotion. If you have expertise in social media development and an understanding of business dynamics, then your skills are needed here. Please, bring along creative ideas to make this platform stand out from the crowd.