https://www.gamespot.com/articles/heres-how-to-get-your-monster-hunter-world-pre-ord/1100-6456365/

Monster Hunter World is now available worldwide on PS4 and Xbox One, and alongside it, Capcom has released an important day-one patch for the game. Not only will you need to install the update if you'd like to play online with other players, it's required in order to receive any of Monster Hunter World's downloadable content, including the bonus items Capcom offered with pre-orders.

After installing the day-one patch, which weighs in at approximately 815 MB, you'll be able to claim rewards from the Housekeeper in your room in Astera. If you pre-ordered the title digitally, you'll have to download your bonus items (the Origin set and Fair Wind Charm) from the PlayStation or Xbox Stores. Once the items have been downloaded, launch Monster Hunter World and talk to your Housekeeper. Select the "Claim Bonuses" option and the items will appear in your Equipment Box.