A “sandbox” is your personal wiki page where you can practice editing, plan out articles, draft articles, or just experiment. You can change your sandbox without impacting the article "mainspace” on Wikipedia — which is what we call live articles.

People can still see your sandbox if they have the link, so it's important that the content you put there isn't something you don't want people to see. This also means you shouldn't copy and paste things there that might violate copyright rules (you'll take trainings about drafting in the sandbox and how to avoid copyright issues later).

To find your sandbox, click the Sandbox link, which can be found at the top right of Wikipedia whenever you're logged in.