https://blog.gongquiz.com/2023/03/19/poppoint-of-purchase-%ea%b4%91%ea%b3%a0%ec%9d%98-%ed%8a%b9%ec%a7%95%ec%9c%bc%eb%a1%9c-%eb%b0%94%eb%a5%b4%ec%a7%80-%ec%95%8a%eb%8a%94-%ea%b2%83%ec%9d%80-%ec%9b%b9%eb%94%94%ec%9e%90%ec%9d%b8/