I don't know how do do diet little idea why to see salt intake on diet n why to use sea salt n organic salt rather than table salt ?

Depends on purpose: but I presume that you trying to lose weight. The basic principle -Output of energy- intake of energy = net weight change in either direction. As for salt, if you don't have hypertension and don't add salt to your food, it is usually not a problem. Regular exercise and reduced carb intake are often effective. Sea salt contains other minerals besides sodium but else nothing that special