When on the 'Review' page for an experiment, you are able to see a live preview of your test. This includes the original and any variants.
At any point, you can save a draft of the current progress. And when ready, click ‘Start Experiment’ to kick off the Experiment.
To use the live preview, enter a URL for the page where you'd like to start previewing your experiment.
By clicking on ‘View Preview’, you can see what your web pages and the variants will look like when running the experiment. Within the preview, you can switch variants and browse pages on your site, which is helpful if you have a variant that spans multiple pages.
A preview bar will pop up from the bottom and you can utilize the dropdown to switch between variants. There is also an option to share the preview to get feedback. Keep in mind, this is only meant to be a preview, and may not load as quickly as it will when the experiment is published.