On Windows 11, you'll find a new Sticky Notes, which is essentially a redesigned version integrated within the OneNote app.

Discover Microsoft's Copilot in OneNote, an AI that transforms handwritten ink notes into summaries, tasks, and editable text using touch, pen, or mouse. Accessible via ribbon or dropdown. Initially ...

Microsoft is bringing Sticky Notes to your iPhone and iPad. You will be able to use them inside OneNote to quickly jot down notes and reminders on the go, and you’ll be able to sync notes from Windows ...