This tutorial explains how to authenticate with Notion's public integration in a Chrome extension demo called Daily Collab, which embeds and transcribes Daily video calls in any Notion page. The demo uses the new public API of Notion, which requires a different authentication approach compared to internal integrations. To use the public integration, users must authorize the app for their workspace by clicking an "Authorize" button, which opens a new tab with an authorization screen from Notion. Once authorized, the user is redirected back to the Daily Collab page and can share an access code with other workspace members, who can then enter it in the Authorization form to authenticate API requests. The demo also shows how to handle errors and edge cases, such as when the admin declines to authorize the app. The tutorial provides a step-by-step guide on how to set up Notion authentication in your own apps using public integrations.