In the Variation Monster plugin’s Variation List settings, the “Items Per Line for Mobile Version” option allows you to control how many variation items are displayed in a single row when viewed on mobile devices. This helps optimize the layout for smaller screens, ensuring that the variation list remains user-friendly and visually appealing.

For example, you can choose to display 1, 2, or more items per line based on your design preference and mobile responsiveness. Adjusting this setting allows for better spacing, readability, and user interaction on mobile devices.

After change it, it shows like the image below.