What is the pragmatic value or functional adequacy o‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌f the theory?

What is the pragmatic value or functional adequacy o‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌f the theory? 2) How has the theory been used in practice? 3) What other uses in practice can you envision for this theory‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌?