Select a creature within 30' range that you have line of sight to and decide whether you want to learn about a) Saving Throws, b) Damage Types or c) Conditions.

If the target makes a Wisdom Saving throw, the spell fails and you get nothing.  If they fail, what you get depends on what you asked for:

If you choose Saving Throws, on a failed save you learn which are their two worst saving throws .

If you choose Damage Types, you learn which is their worst Damage Type (You get a list of the ones they are vulnerable to if any.  If they are not vulnerable to any, you are told which do normal damage.  If they are resistant or immune to all damage types, you get a list of the ones they are resistant to, rather than just immune.  If they are immune to everything, you are told "RUN AWAY").

If you choose Conditions, you are told which conditions they are immune to.