Gnome Shell window snap to quarters of screen

There are several extensions on the GNOME extensions site which can give you various modes of "snapping" your windows. One that works particularly well is gTile.

   

References

• Keyboard Shortcuts GNOME 3

See shelltile.

It's a neat little extension that allows the corner snapping, as well as other very useful features.

I suggest the extension Put Window.

It has many customization options, ability to modify hot keys, etc.. Similar to all extensions it can be installed and activated at extensions.gnome.org