This sea salt is a pure large-grained salt that was originally used in the process of making meat kosher Actually, all salt, just by its nature of being a simple mineral compound is kosher. All raw vegetables and fruits are kosher and minerals are kosher.
This salt is not iodized as table salt often is. Iodine has a slightly bitter, metallic taste.
Kosher salt grains are larger so it is easier to see where you are salting and you generally are less likely to oversalt.