Rewards are a big part of Super Mario Party Jamboree that unlock over time after you complete objectives in-game, with 50 available overall.

By earning rewards, not only do you rank up your player level, but you can also unlock additional stages and other items like stickers, reactions, and other minor collectibles. You can upgrade your rewards with every achievement you complete, and you only need to complete 50 of the nearly 100 Achievements to get your hands on everything the game has to offer.