The purpose of this study is to investigate the difference between the brand selection decisions before and after the ad serving and to examine the impact of attitude. which is owned by the consumer before the ad. to the changes in consumer decisions in the selection of the brand. This study was conducted using causal research design. https://www.getpureroutine.com/hot-sale-ethical-nutrients-mega-magnesium-powder-citrus-450g-for-sale-save-big/