highly processed salt -> so it wont impart any other flavors -> so recipes are more predictable
larger crystals -> better for maranades and brines -> easier to pinch and add by hand
"kosher"? -> the name comes from its great effect at "koshering" meat (because of those large crystals)
while it is highly processed, different brangs have different sality levels -> so pick one brand and stick with it to develop your personal pinch-to-saltiness ratio