What happens to an archived goal?
The goal becomes inactive and can no longer derail, and goes into your archived gallery. You can still access the goal and data from the archived gallery or at the same URL as before.
If you want to restart the goal later to get back on the hook, you can do that with the Restart button on the right-hand side of the goal page. (If you don't see the buttons on the right, make sure you're logged in to the website!)
Keywords: inactive goals, what archiving entails