Shortcuts · Apps and windows
Snap window to half the screen: the Mac and Windows shortcut
macOS
fn+Control+Left arrow+/+Right arrow
Windows
Win+Left arrow+/+Right arrow
What catches people out
macOS only shipped built-in tiling in Sequoia (15). Before that it took Rectangle or Magnet.
HouseWindows has had this for fifteen years.
See it in the full table alongside 69 others, or search for the one you actually came for.