PRIOR TO MACOS Sonoma, widgets lived in Notification Center. To see them, you had to click on the date and time in the menu bar or swipe the trackpad. They would then slide out and display info, for you to slide them away again. But now, in macOS Sonoma, widgets sit on the desktop.
And widgets are now interactive. As well as reading info, you canor off in the Home widget, or mark a to–do in the Reminders widget as completed.
