Quick take
Notion AI is most useful when your team already keeps notes, projects, docs, and knowledge in Notion. It can search workspace content, draft pages, summarize meetings, autofill databases, and use connected apps on higher plans. It is not the best first AI tool if your information is scattered everywhere and nobody owns the workspace structure.
Best fit
Use Notion AI for company knowledge, project docs, meeting notes, research reports, database summaries, and internal operating pages. It works best when the source pages are clean, current, and permissioned correctly.