In publishing and journalism, the term “TK” serves as a placeholder used to mark where missing information can be added later. The “TK” stands for “to come,” but uses a “K” instead of “C” as there are few English words where the “tk” letter combination exists, making it stand out more easily in written text where it could be caught by proofreaders. In Medium’s app, TK takes on a new role as it tries to help users fill in the blanks. The company suggests th