What this tile shows
Squizzie calls this one Redemption rate. It reads as a percentage.
Where the number comes from
Perkie Loyalty. Points balances, earning, redemption, and tier distribution.
What you need for it to appear
Nothing beyond Squizzie and the shop data it already reads.
The fuller picture
This is one figure out of a bigger subject. Loyalty reporting in Squizzie covers it properly.