t table , namely t count = 10.710 and t table = 1.072. This shows that there is an influence on the effectiveness of the "Free Shipping" Tagline on product purchases in the Shopee application. Get the results of a simple linear regression with the equation Y=7,891+1,072X. The magnitude of the influence of the X variable on the Y variable is 57,4%. Keywords: Effectiveness, Tagline, Purchase Decision, Shopee" />