The default keyboard shortcut to pin any window to the screen is Windows Key + Control + T. (You can change this, if you want, in the Always On Top section of the PowerToys app.

While Windows 11 already lets you pin apps to the taskbar by dragging-and-dropping icons from the Desktop or the Start menu, Microsoft is testing a new option: dragging-and-dropping from search ...

You can pin chats on Signal so that your frequently visited conversations remain at the top of the screen for easy access.

Twitter allows users to pin up to six favorite conversations in the Direct Messages tab to keep atop the screen whenever accessing messages in the app.