The directory with its upper level topics and sub-categories could provide more specific results than the usual keyword search.

[3] Unlike the keyword search function of Google, the directory organization was created by humans.

On top of that was the slogan in green letters: "The web organized by topic into categories."

[4] Sub-categories would be created as needed, and eventually the user would get to a page with no more subcategories.

It was completely disconnected from the rest of the directory, so if you clicked it by accident, you would have to press the back button on your web browser.