Media tagging is a research concept and methodological practice focused on the annotation of digital media content with descriptive labels (tags). This field, situated within information science, digital media studies, and related disciplines, investigates the socio-technical processes of tag creation and usage, the structure and dynamics of emergent classification systems (folksonomies), and the efficacy of tagging for content organization, retrieval, and computational analysis, highlighting its significance in distributed information architecture and user-generated metadata.