You can passively smell the types of all living creatures within 30 feet. You can detect dead and undead creatures as well, but you cannot distinguish within or between them. They all smell like death. You also gain Scent Seeing. You can not detect odorless creatures in this way.
You know the exact location of all target creatures. You continue to know the location of all targets within 10 feet, whether they are or you are moving or not, so long as they are still within 10 feet of you.