You can set the layout for each widget area separately. This means that you can have a single column hero image at the top of your page, followed by a three column layout featuring icon blocks below, then four columns of text, and so on.
To set the number of columns for your sidebar, use the ‘Layout’ dropdown:
The widgets that you add to this widget area will then automatically lay themselves out according to the selected number of columns. If you’ve selected two columns, the first widget you add will sit in the left hand column and the second widget will sit on the right. Drag and drop the widgets to change their order.
If you add more widgets than there are columns, the additional widgets will start a new row with the same layout.