Grassroots economic development is critical for achieving inclusive growth in developing economies, where small and medium-sized enterprises (SMEs) and informal sector actors dominate local commerce. In Rivers State, Nigeria, market women and SMEs constitute a significant share of the local economy yet face constraints such as limited market access, low visibility, and insufficient branding capabilities. This position paper argues that leveraging digital marketing and culturally rooted local branding can enhance competitiveness, customer engagement, and revenue growth among grassroots entrepreneurs. Drawing from the Resource-Based View and Community Economic Development theory, the paper presents practical strategies including social media engagement, mobile commerce adoption, collaborative online promotion, and community-based branding. Policy support through digital literacy programs, infrastructure development, and financial inclusion is emphasized. Integrating digital marketing with local branding provides a strategic pathway for empowering grassroots entrepreneurs and stimulating sustainable economic growth in Rivers State.