All account users, except for external users and collaborators, can join a public space directly. External users and collaborators can join through an invitation by the space admin.
Unlike private spaces, public ones are open for users to join them if needed. If you want a public space to always be shown in the Spaces section of the Home page, you can join it.
If you want to join a private space, you need to ask the space admin to send you an invitation.
Space admins receive Inbox notifications when users join the space.
Go to the Home page.
Click Explore spaces next to the Spaces section.
Select a space from the list or type the title of a space and then select it from the list.
Click Join space at the top-right corner.
You’re now a member of the space and your profile picture appears in the list of space members. The space appears on your Home page.