This article explains how to use snap layouts in Windows 11 (and the productivity benefits they bring).
Windows 11 Snap Layouts
Snap layouts allow you to maximize your screen real estate by physically arranging multiple open apps into a specific grid on the desktop (i.e., arranging apps side by side on the screen). The available layouts can accommodate apps of different sizes, and you can view them all at once. Here's how to use the Snap feature in Windows 11.
Hover over the Maximize button in an app window to reveal snap layouts. You can also use the keyboard shortcut Win+Z.
Select a layout in the snap panel. You will see four or six, depending on your screen size.