what are its uses in food?
It is used in canned foods,  for preservation and flavoring, Dairy salt is used in butter and cheese products, and used as a condiment in sauces etc
Salt
canned foods
where does salt come from in the world Sodium chloride and seawater how is it produced? Salt is extracted from the vast sedimentary deposits  and is then mined directly or extracted and then purified by mechanical evaporation of brine. It is then refined and goes through recrystallization. what is its religious significance? It was used in Brahmanic sacrifices, ancient Egyptians, Greeks and Romans invoked their gods with offerings of salt and water, Huixtochihuatl in Aztec mythology was a fertility goddess who presided over salt and water, it is also considered to be a very auspicious substance in Hinduism etc
wiki:20271600
Salt [SEP] Salt in food
Salt is present in most foods, but in naturally occurring foodstuffs such as meats, vegetables and fruit, it is present in very small quantities. It is often added to processed foods (such as canned foods and especially salted foods, pickled foods, and snack foods or other convenience foods), where it functions as both a preservative and a flavoring. Dairy salt is used in the preparation of butter and cheese products. As a flavoring, salt enhances the taste of other foods by suppressing the bitterness of those foods making them more palatable and relatively sweeter. Before the advent of electrically powered refrigeration, salting was one of the main methods of food preservation.