Let’s say that on a laptop, we want to display 4 items in a row. In the example below, a screen section containing 4 cards was used. They come prefigured to fit optimally across all screen sizes. You can see that there are 4 items that span the screen. Each one is housed within a column, and each column can be sized appropriately for the relevant screen size. In the case below, each column has a span of 3 cells. Therefore, the 4 columns each with a span of 3 take up the full screen size of 12 cells.