In addition to Task View, Windows 10 also introduced a productivity tool called Snap Assist that assists in managing application windows on your desktop. Here's a quick run through of the features offered to you through Snap Assist.
Select any app window and drag it until your mouse cursor hits the corner of your screen. A small animation will be displayed. Release the app window to snap it to the corner of your screen:
Windows will then display a list of items that can be snapped next to the first app window. Simply click the item to make your selection.
Use Snap to Arrange Your Windows
You can use a combination of the [Windows] + Cursor keys to change the position of the current app window on your desktop:
Tip: Windows 10 allows you to snap up to 4 simultaneous app windows in a 2x2 layout. Once you snap your first app window, you may use the key combinations to position the window in one of the corners of your screen. This action may be repeated for subsequent apps:
Use Snap to Resize App Windows
Once you have split your workspace, adjusting the size of the app windows is very simple.
Move your mouse cursor in between the app windows. Your cursor should take the form of a double headed arrow. Hold down the left mouse button and drag the mouse cursor to resize the windows your liking.
Snap Assist Enhancements
Windows 10 also offers a few settings that enhance the Snap Assist feature.
Click on Start > Settings > System. Then click on Multitasking > Snap. Make sure that the When I snap a window, automatically size it to fill available space, When I resize a snapped window, simultaneously resize any adjacent snapped window, and When I snap a window, show what I can snap next to it options are enabled.
How To Disable Snap Assist
You can disable Snap Assist by simply toggling the Arrange windows automatically by dragging them to the sides or corners of the screen option Off: