As a DM I wonder, what conditions if any must be met to impose an advantage or disadvantage on a roll.
Example - the PC's are tracking a wolf, but the entire party wandered over the tracks several times before noticing them, disadvantage survival (tracking)?
Example - the PC's have had experience handling a similar magical item, they find an item and want to determine if it is evil/good/what effect it may have. Advantage arcana?
Just wondering what is RAW on granting advantage for checks, or if I have accidentally been home brewing certain situations.