Romadayanti C, Wulandari V. The Implications of User-Generated Content (UGC) for Digital Marketing Strategies in Indonesia: A Systematic Literature Review of Research Trends and Key Insights Over the Past Decade (2015–2025). Int. J. Adv. Res. Soc. Stud. 2026;5(1):12-36. doi:10.5281/zenodo.19433820