Low or high can be either good or bad — it depends on whether you need more of a nutrient (like dietary fiber) or less (like saturated fat).
If a food has 5% DV or less of a nutrient per serving, it is considered low in that nutrient. If it has 20% DV or more of a nutrient per serving, it is considered high in that nutrient. Low or high can be either good or bad — it depends on whether you need more of a nutrient (like dietary fiber) or less (like saturated fat).