Since this is a fictional world, a bunch of Arctic animals will try to help you achieve a randomly generated progressive reward, waiting for you on the grid. Even if they don't give you the biggest bonus, they certainly get a lot of cash, combined with their power to bring home Bacon.
The adventurous feature is actually just a peculiar phrase used to describe the scattered symbols and wildness that come together and act in concert. To move from a casual player to an experienced explorer, you need to trigger 8 free games by finding three or more scatter symbols.