Whether you're still in the planning phase and want to share a preview of your site with someone before you publish it, or you just want to see what it will look like before starting your subscription, you'll find a the Preview button in the top right of your editor that allows you to share you site link.
Click Preview fro the top right of your editor
2. This will open a preview page. Click the blue 'Share Link' button to copy the link to your site.