First, this is salt. Food needs salt to taste good. So if you’re the type of person who eats food, you should be putting salt in and on it.
Second, this is sea salt, which is a more flavorful version of regular old table salt. [It has more bits of the sea in it.]
Third, these are flakes. Flakes won’t immediately dissolve upon meeting your soon-to-be-tastier dish. People will get a little “crunch” [technical term] from these flakes when they take a bite. Why is crunch in quotes? Because I didn’t know how else to convey a profound sense of onomatopoeia-ness.
4. Visual Appeal
As mentioned [you read #3, right?], these won’t immediately dissolve, so you’ll be able to see them. I don’t know about you, but I get giddy when I see sea salt flakes on a plate of food, because it signals to me that a) the chef knows what she’s doing and, b) I get giddy anytime food comes my way.