What is Tech Judge in debate?

A tech (or flow) judge tracks every argument and decides the round by what was won, dropped, extended, and weighed on paper. In front of a tech judge, coverage and disciplined extensions matter a great deal: a conceded turn is a conceded turn no matter how it was delivered. Read the paradigm before the round, since most judges describe themselves, and adjust. Give tech judges full line-by-line, give lay judges a clear story of the round, and give the many judges in between both.