Your food distributor buys your product from you at a wholesale price and delivers it to the stores that your broker has sold your product to. Again, if you are developing sales into new places, you will also need to develop your distribution.
A food broker is an independent sales agent who works for you, the brand owner, selling your products to stores. If you are developing sales channels and selling into different markets, like overseas, you may need more than one.
Think of food broker as your part-time sales rep.