What this tile shows
Squizzie calls this one Avg Search Position. It reads as a figure to two places, because rounding it to whole numbers would hide the movement worth seeing.
Where the number comes from
Google Search Console. Organic search performance: clicks, impressions, position, and query data.
What you need for it to appear
A connected Google Search Console property, through the same single Google sign-in.
The fuller picture
This is one figure out of a bigger subject. Search rankings and your local listing covers it properly.