Mahesh Dutta Mishra, Amar Singh Rathore, Abhishek Jain, and Satish Manwani. 2026. “Digital Marketing ROI Financial Evaluation of Online Campaigns”. International Journal of Innovations in Science, Engineering And Management 5 (1): 81-89. https://doi.org/10.69968/ijisem.2026v5i181-89.