With a responsive design your online shop can be displayed on all mobile devices:
To support all these devices extra flexibility is needed. Responsive websites are "liquid" and spread the content over the screen for optimal display and usability.
On a responsive online shop all objects are placed below each other if there is insufficient horizontal space. It's possible that on a wide desktop screen 8 products are displayed horizontally and they are displayed below each other on a smartphone.
Navigate to Settings > Layout > Edit. At the top under the cloud icon you can choose a template (or design).
The templates with the Responsive icon can adapt depending on the screen size of your visitors. These templates work on smartphones and tablets.