Write together, on the same page
Everyone with a page open sees the others' changes and cursors as they type, and each comment is tied to the passage it's about.
Live co-editing
Changes and cursors appear as people type, and the page's header shows who else has it open.
Comments on a passage
Select text and start a thread on it, then reply, react and resolve it. Anyone who can edit pages comments, and everyone else can read them.
Mentions
Mention a member of your organisation with @ in a comment, and they're notified.
Kept while you're offline
Edits made while you're offline are kept in your browser, even if you close the tab, and sent when you're back online.
Write your team's wiki in Notes
Every Business plan includes it, with Mail, Drive, Tasks and the rest of your workplace.