It means relative to the movement of money. Movements of monetary resources between individuals, enterprises or the State. Branch of Economics and Administration that is dedicated to studying the exchange of money or capital.
Although in Spanish there is finanza it is considered an old and disused voice, and its meaning of "rescue" is not shared by the plural 'finanazas' that is still used as "goods, treasury (especially that of a public nature), and its administration".
FINANCE money management