Editors, content managers, and site admins have access to an easy way to preview what their site looks like in a variety of mobile devices. All Site Builder Sites have a responsive design, meaning the website adapts to fit most common screen sizes and still look good and be functional.
To use this feature:
- Log in to your site
- Visit a page on your site
- Click the device icon in the top right of the admin toolbar
- Select a device to preview with
- The browser viewport should change to roughly the size of that device so you can view that page at that size
Note that while the device preview is a handy feature, it may still be best to test with an actual mobile device to ensure compatibility.