With the rapid development of technology, lifestyle is slowly changing. One of them is shopping online through E-commerce. Shopee is one of the E-commerce sites with the highest visitor rates in Southeast Asia in 2019. This is due to the ease of use of the Shopee E-commerce application and the promotions carried out by Shopee E-Commerce This research is used to find out how easy it is to use applications and promotions on E-Commerce Shopee. The purpose of this study was to determine the effect of ease of use of applications and promotions on purchasing decisions at E-Commerce Shopee either partially or simultaneously. The results showed that in the descriptive analysis of the application ease of use variables, 96.3% were in the high category, the promotion variable was in the high category, and the decision variable was 86.8% in the high category. Partially, the ease of use of the application does not have a significant effect on purchasing decisions, while promotions have a significant effect on purchasing decisions. Simultaneously the ease of use of applications and promotions significantly influence purchasing decisions.

Keywords: Ease of Use of Applications, Promotion, Purchase Decision