Now, the same way we spoke about ka's being ratios in terms of ionization of acids, we could also talk about KBS or ionization of bases being ratios. Their ratios of amount of product formed over the amount of react is left. So that means the greater our value for KB is, the more favorable our reaction is this way. And this means the better or stronger our base is. If this guy is greater than one, we can say that it's a strong base. If it's less than one, it's a weak base.