Whenever you're happy with the setup and the configuration, you'll be ready to go live and publish your store. To switch from one mode to another, simply use the corresponding environment API key when including the Snipcart JS file on your website.
When adding Snipcart JS file to your website, use the Live key instead of the Test API Key, and all your orders will show up in your Live environment dashboard. As simple as that!
Importing account settings from Test to Live mode
Chances are you've configured quite a few settings in Test mode while integrating Snipcart (taxes, shipping, checkout, etc.).
To make sure you don't have to go through all of these configurations again when going live, you should use the Import settings from Test mode button to import each setting defined in Test mode to your Live mode.
You can find that button under Account configurations, in the right-sided menu of your dashboard.
Know that doing so might override your actual Live mode settings.