Open Stats and pick the period every number answers: 30d, 90d, 1Y, All (your whole book) or Custom, with From and To dates. The sentence below sums it up.
What the numbers count
The five figures, the outcome ring and Top borrowers count the loans you made in the period, with everything since. The two charts count the money that moved in it.
Average interest is the interest you set, as lenders quote it: $100 repaid as $130 is 30%. It is weighted by dollars and counts the loans with a repayment total ("on 38 of 42 loans"). Typical loan is the middle rate. A total below the amount lent counts as negative, and the card says how many. Each currency keeps its own rate.
Zoom in and follow a number
Drag across Lent vs. repaid to zoom in. Select a slice of the ring or a top borrower to open those loans. The period stays in the web address, so a bookmark reopens it. A dash under Average interest means no loan in the period records a repayment total yet; add one in Loans.