It supports halves (horizontal/vertical), thirds (vertical), quarters (vertical or 2x2), and sixths (3x2), plus some variations (move to edge, "almost maximize", bigger, smaller, etc). Also supports variations on those, eg. "middle two quarters" or "right two thirds" if that's your thing.
I have an ultrawide external display, and keyboard shortcuts to quickly tile two or three windows at once is where it's at, though it also supports dragging the window to an edge for various snap effects.
