Every product needs at least one pricing row for the pricing method you have chosen — the store will not let you save one without it, because a product with no price cannot be bought.
Price brackets
Branded goods get cheaper in volume, and price brackets let the store reflect that: one price for a single item, a lower one from ten, lower again from fifty.
Use them where your own costs genuinely change. Brackets that do not match your supplier's breaks just give away margin at the quantities people actually order.
The message under the price
A default message can sit under every price, and be overridden per product. It is the right place for the thing buyers most often get wrong — whether tax is included, whether printing is included, whether the price drops in volume.
Changing prices in bulk
Prices can be edited across the store at once, including by a percentage — which is how an annual increase or a supplier change gets applied without opening sixty products.