When Apple Search Ads launched in October 2016 it only displayed ads in the United States. However, it expanded to multiple English speaking countries on April 25, 2017 to include the United Kingdom, Australia, and New Zealand. Each country is represented by a different storefront and to get your ad to display in each storefront you need to create a separate campaign for each country. By August 1, 2018, Apple Search Ads expanded to include France, Germany, Italy, Japan, Mexico, South Korea...