How do you activate the built in self-service customer knowledge base?

Under the title "Provide smarter self-service" on https://www.odoo.com/page/helpdesk there is an image of a site with the title "Helpdesk" with three columns; "Popular presentations", "Popular questions" and two buttons, "Submit an Issue" and "View my Issues". How do you activate that site template? Or how do you replicate it?

Thank you in advance!