Source: Player's Handbook

Alert to the hidden traps and secret doors found in many dungeons, you gain the following benefits:

  • You have advantage on Wisdom (Perception) and Intelligence (Investigation) checks made to detect the presence of secret doors.
  • You have advantage on saving throws made to avoid or resist traps.
  • You have resistance to the damage dealt by traps.
  • Travelling at a fast pace doesn't impose the normal -5 penalty on your passive Wisdom (Perception) score.