What this tile shows
Squizzie calls this one Avg Order Value. It reads as a money figure in your shop currency.
Where the number comes from
WooCommerce Orders. Order data including revenue, counts, and averages.
What you need for it to appear
Nothing beyond Squizzie and the shop data it already reads.
Charting
This one charts as well as tiles, so it can go on a report as a figure, as a graph, or as both.