Most industrial, large-scale farmed chickens do not come with giblets. Pity. But if you buy your poultry from a small farmer or a good butcher, you may find this little treat wrapped up inside the cavity of the bird. Minus the liver which can give the stock a bitter flavor, the giblets are best prepared as a stock to then add to the drippings in the roasting pan, and end up with a flavorful gravy. They can also be added to a stock made with a left over chicken carcass or two. In that case, toss them in raw while the stock simmers away. The liver is best pan-fried with garlic and spread on toast, if you want one cook's opinion.
Turkey giblets are usually significant enough in size that they can be used in a dish like pâta. Some people insist in cooked and chopped up giblets being added to their Thanksgiving stuffing.
Get to know this part of your chicken. How would you like it if someone tossed your vital organs in the trash?