Click the "Share" button to open up "Sharing Options". It is available from both the Space view or from the Editor.
Then select the right option to share your experience with others.
You are able to edit the visibility of your project depending on how you plan to share your project to your audience:
Private: The experience will only be visible to Wonda VR Spaces users that have been invited to your Hub.
Open: Your experience is publicly available and login is not required.
Note that the sharing options impacts both Single and Multiplayer Session Links (check this article to get more information about Multiplayer Session).