In the digital era, responsible communication plays a crucial role in shaping sustainable marketing strategies. This study explores the impact of responsible communication on promoting sustainable development through digital marketing in Algeria. By integrating theoretical insights from corporate social responsibility (CSR), sustainability, and digital marketing, the research examines how consumer trust and corporate reputation mediate this relationship, while government regulations and social norms act as moderating factors. Using Structural Equation Modeling (SEM) in Lavaan, data was collected from Algerian businesses engaged in digital marketing and analyzed to assess the relationships between the variables. The results highlight the significance of ethical communication in fostering consumer trust, strengthening sustainable brand engagement, and enhancing overall sustainability outcomes. The findings offer valuable insights for policymakers, marketing professionals, and business leaders on leveraging responsible communication strategies for sustainable development in Algeria’s digital economy.