Final results from the CUPID-Mo $0\nu \beta \beta$ experiment

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.