A tiling window manager is one which by default automatically assigns each newly created non-dialogue windows to a non-overlapping share of the screen according to a set of rules.

A lot of environments have a function to relocate the focused window to a predefined portion of the screen. For example left and right half. This makes it a stacking environment with limited tiling features.

> Not sure why static tilers are so rare, but Gnome offers static tiling and is very polished, so I guess that's why I like it.