There really are a few useful things to check on a package of chicken, although there is no secret code that automatically tells you which package is “best.” Start with the date and condition of the package. USDA says a “sell-by” date is mainly for store inventory, not a safety deadline. Fresh chicken should generally be cooked or frozen within one to two days after purchase and kept refrigerated at 40°F (4°C) or below.
Next, look at the actual product description and ingredient list. Plain chicken should have a very short ingredient list, while some packages contain added water, broth, salt, or flavoring solutions. Those additives must be declared on the label. If you want chicken with less added sodium or water, compare the ingredient statement and Nutrition Facts instead of relying only on attractive words printed across the front.