The All tiles page helps give users an overview of all the content in your project, as well as completed and archived tiles that might have been removed from the home page.
On this page, you can add and remove:
Titles
Text blocks
Tiles blocks (which can be further customised with custom order, filters, etc.)

Above: The edit mode view of the "All tiles" page, highlighting the page name in the page dropdown as well as the non-customisable "locked" tiles block at the bottom of each page.