The mAP, or mean average precision (AP) is an evaluation metric describing the precision of your object detection models. It is calculated from IOU (the Intersection Over Union is used to determine whether the bounding box was correctly predicted), Precision, Recall, Precision-Recall Curve, and AP. You can find the mAP of your object detection model per label in your workspace under Object Detection: Tasks: Models in the detail of the particular model.