It's very important to preview the projects before you go live. You can open a preview of the project's variation either from the Editor or directly from the dashboard.
When a preview is opened preview parameters are added to the URL. You can use this URL and send it to other devices by copying the URL with the preview parameters. Preview links do not require you to be logged in to Symplify so you can do your full QA for the project by opening this URL on different devices and browsers and checking that everything looks ok before you activate your project.
If the preview parameters do not show in the URL you can re-add them by choosing the variation in the preview bar at the bottom left (see image below).