Setting up positioning
You need positioning to create free sections. It lets you control the position of elements on the canvas.
This makes your sections look the same across different devices with various viewports, for example, on 6.5 inch smartphones and 32 inch PC monitors.
You need to set up the section in such a way that its components would "stay put" across different devices, i.e. they would retain their position relative to each other.
Positioning of elements in the standard sections is already set up for you. Positioning of elements in free sections depends entirely on your choice.