Final answer:
Georg Simmel advanced Formal Sociology, which focuses on the patterns and forms of social interaction, emphasizing the dynamics of relationships over the specific content of interaction.
Step-by-step explanation:
The brand of sociology advanced by Georg Simmel, which focuses on the form that interaction takes rather than the content of interaction, is known as Formal Sociology. Simmel's approach is concerned with the patterns and forms of social interaction, examining the dynamics present regardless of the particular content of the interactions. By studying the geometric shape of relationships rather than what they are about, Simmel was instrumental in developing a micro-level sociological perspective that closely looks at the subtleties of human behavior and social interaction in day-to-day life.