The key element of kosher meaning is the species of animals and fish that may be consumed. Some animals are only allowed, such as the cow and sheep, whereas others, such as pigs, are not. Equally, the fish must possess fins and scales, which must be kosher. A Kosher Certificate is given to ensure that businesses do not mistake such requirements. https://writforus.com/kosher-meaning-simple-guide-to-rules-and-practices/