<p>In the digital economy, small and medium-sized enterprises (SMEs) face mounting pressure to optimize user engagement and conversion with limited resources. This article explores digital nudging—the strategic application of behavioral economics in interface and experience design—as a low-cost, high-impact innovation tool for SMEs. Drawing from foundational theories of nudging and bounded rationality, the paper examines how cognitive biases such as loss aversion, default effects, and social proof can be ethically embedded in UI/UX design to influence consumer behavior. It further highlights practical implementations of digital nudges across SME sectors, including e-commerce, SaaS, local services, and coaching platforms, while emphasizing the balance between behavioral influence and user autonomy. Ethical considerations, such as transparency, consent, and the avoidance of dark patterns, are critically addressed. The article concludes by positioning digital nudging as not only a tool for persuasion but also a pathway for strategic differentiation, data-informed learning, and inclusive digital transformation. Future research directions include the integration of AI-driven personalization, cross-cultural adaptations, and regulatory frameworks to ensure responsible use in SME contexts.</p>