Salting of fish is a traditional preservation method that reduces bacterial action and is often combined with techniques like drying and smoking. Sardines, a popular type of salted fish, provide various health benefits, including essential vitamins and minerals, and the salting process involves scaling, salting, pressing, and brining before final storage in oil. The document outlines the nutritional value of sardines, methods of salting, and the importance of proper packing for preservation.