The document discusses several Gmail Labs features that can enhance productivity and organization when using Gmail. It describes features such as the Unread Message Icon, Canned Responses, Auto-Advance, Keyboard Shortcuts, Multiple Inboxes, Quick Links, Preview Pane, and Google Calendar Gadget. These features allow users to view unread counts, save frequently used response templates, automatically advance between emails, set keyboard shortcuts, create additional inboxes, add quick links to other sites, preview emails, and access Google Calendar all within the Gmail interface.