The Home tab is your live view of today: sales, customers, and whether receipts are being collected — updating in real time as you trade.
Today's sales — dollar total, customer count and average sale.
Collected — how many of today's receipts customers actually tapped for, with your collection rate.
Repeat — how many of today's customers have shopped with you before.
Recent receipts — your most recent receipts, whichever day they were issued; tap any to open it. Before your first sale goes through Square the list is empty, and it says receipts appear there as soon as one does. In the list view each receipt shows its time, like "2:30 PM", and the line under the list says times are in the shop's local time.