On Windows, Is it possible to split a screen to consider it as 2 different screens

Question

On Windows, I'm trying to split a screen is half. The purpose is to have a small screen on the side of my screen.

The windows sizing functionnalities of windows are good, but I have a part on my screen ONLY used for some "always here" app like a spotify or a whatsapp. The problem is sometimes I cover it with an other windows, I'm alway resizing my windows.

Do you know a soft or an option to do it ?

EDIT : So, I KNOW snap and powertoys, but this is NOT what I'm looking for.

I will try 2 softs :

• https://www.donationcoder.com/software/mouser/other-windows-apps/desktopcoral, to create a safe zone, it could be ok for me if it's working well. A safe zone will protect my apps from a resize or a snap trigger.
• https://www.displayfusion.com/ seems to propose to divide a screen and add more options for the desks, it could be the answer.

Answer 1

Like this?
Does not split the screen, but reserves space of one app and forces others out of it. https://www.donationcoder.com/software/mouser/other-windows-apps/desktopcoral

Answer 2

Windows 11 has the new feature of Snap, described in the article Snap your windows.

Basically, while your window is active, press Win+Z or hover over the Maximum icon in the title-bar, to show this dialog with six possible layouts:

Clicking on one rectangle inside any one layout will resize the current window so it fills the matching part of the screen.

For more information and methods see the article
How to Split Screen into 2, 3 or 4 Sections on Windows 10/11.

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For more sophisticated layouts, you may use :

• FancyZones utility which is part of Microsoft's Power Toys.
  More information can be found in the article How to use FancyZones, Windows 10’s new tiling window manager.
• Jgpaiva's GridMove might be the most flexible and is open source.