MAP stands for Minimum Advertised Price, or the lowest price an item can be listed at. MAPs are often set by a brand or vendor, which resellers must follow.
While on a SKU page in Aura, you will notice a field titled "MAP price."
Here, you may enter the MAP for the product, if one exists. This field is for reference only.
In order for Aura to follow MAP, the Min price would need to be manually set to the MAP value.