Giving exhortation or advice; marked by strong urging; encouraging; inciting; as, a hortatory speech.
EG:[H]e later gave up the ministry in the conviction that he could reach thousands with his beguiling pen and only hundreds with his hortatory voice. --Carl Van Doren, The American Novel, 1789-1939
Instead of "Home Run, Jack," the hortatory message that greets the batter at the plate is the subliminal one that surfaces: "Run Home, Jack." --Marjorie Garber, Symptoms of Culture