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

Simple Sticky Notes lets you create sticky notes on your PC.They’re just like the Post-it notes that litter people’soffices–but more private and not so unsightly. It’s incrediblyeasy to create them.

For quick reminders and can’t-miss memos, sticky notes are effective tools, and I’d argue that the simplicity of the sticky note is its best attribute. But the ease behind propping up sticky notes ...