What is the main function of the Uniqlo app?

The main function of the Uniqlo app is to enhance the customer shopping experience, which includes features such as online ordering and a store locator. This focus on functionality is designed to make it easier and more convenient for customers to shop for Uniqlo products. By allowing users to browse the latest collections, place orders directly through the app, and find nearby store locations, the app streamlines the shopping process and meets modern consumer demands for efficiency and accessibility.

While providing fashion advice, serving as a social media platform, or showcasing brand history could be valuable aspects of an app, they do not align with the primary aim of the Uniqlo app. The emphasis is squarely on improving the shopping experience, which is why that choice is the correct answer.