why isnt my tile feature working?

Bathroom tiles. kitchen tiles, carpet tiles, interior design can be a nightmare, perhaps it's your colour combinations or your textures it could even be down to lighting.

There is a keyboard in front of you with the ability to write every word you can think of, I am sure you can think of more than six to describe your problem.

Does this not work?

macOS Catalina

Hover your pointer over the full-screen button in the upper-left corner of a window. Or click and hold the button.

Choose ”Tile Window to Left of Screen” or ”Tile Window to Right of Screen” from the menu. The window then fills that side of the screen.

Click a window on the other side of the screen to begin using both windows side by side.

What is a "tile feature?"