  CUPID-Mo is a demonstrator experiment for the next generation
$0\nu\beta\beta$ experiment CUPID. It consisted of an array of 20 Lithium
Molybdate (LMO) cryogenic calorimeters with 20 Ge LDs for a dual readout of
heat and light. In this proceeding, we describe the final results of CUPID-Mo.
We show CUPID-Mo reached performances compatible with or close to the CUPID
goals. We describe the new limits on double beta decays to both ground and
excited states. In addition, we present the results of a detailed background
model of the experimental data, leading to a measurement of the lowest ever
background index for a bolometric $0\nu\beta\beta$ experiment.
