The List widget looks basically the same as a report, with the name, and start/end dates shown along with the five most recent runs of the report. When you add multiple custom widgets to a dashboard, by default they take the List style and are placed at the bottom of your dashboard. The image below shows a sample dashboard with a expanded List widget at the bottom.
You select this icon if you want to directly apply the List style to a widget.
Example list widget
This sample shows an expanded List widget, which displays the five most recent runs of the underlying report.
Unlike the other widget types, the list style requires no setup. To apply a different chart style to a list widget, just click the cog and then Edit.