Various factors that make potato Lay popular. It can be seen that even potato Daley will cost 6 baht, which is more expensive than other brands on the market, which sell for 5 baht, but consumers still consume Leyland because in the eyes of consumers feel the difference in flavor. Quality is more than just pay a little to get a lot more satisfaction. Also, Lay also organizes promotional items such as Lay's Million buy two packs get another one envelope to stimulate sales, the market continues.