With Split View, you can fill your Mac screen with two apps, without having to manually move and resize windows.
How to enter Split View
Hover your pointer on the full-screen button in the upper-left corner of a window
Alternatively, 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.
Then, click a window on the other side of the screen to begin using both windows side by side