First a player needs to pick one of the Actions with in the cost, to get the benefits of this action.
Rest Actions are on every Village Card , but can also be found on some Item or Enchantment Cards.
The icon should be read as:
Use your Major Action as a Rest Action. Then at the end of your turn the first card on the Journey Track is placed on the Graveyard. Slide the other cards left toward the Village Card and draw a new card from the Adventure Deck to fill the last empty space.
Taking a Rest is a standard way of gaining Crystals and healing Wounds .
Players can not use several Rest actions from different cards, they have to choose ONE.