Coarse salt, sometimes called kosher salt (incorrectly, however), is a type of salt that is formed into large crystals or granules. It is often used to salt meat, as an ingredient in brines, and also in regular recipes, like soups and sauces.
Table salt is much more commonly used than coarse salt. Its fine granules can be found in a myriad of recipes, from cookies to couscous. It is supplemented with iodine for nutritional purposes and is scientifically known as sodium chloride.