Confluence space overview
When this setting is disabled, clicking the space name in the left-hand menu on pages takes users to the space's landing page (if it has one). When this setting is enabled, they're taken to the space overview page.
Regardless of this setting, users can find the Confluence space home via search, modules, or Confluence pages.
Enable/disable the Confluence space home
This setting is not available when pages are displayed as in native Confluence.