How can I earn badges in Mario Kart Tour?

To earn badges in Mario Kart Tour, one must complete specific challenges set out by the game. These challenges vary and can include tasks such as achieving a high score on a particular course, performing a certain number of jump boosts, taking out opponents with items like shells or banana peels, or finishing races within a set position. Each tour update brings a new set of challenges, and once players meet the criteria for these challenges, they are rewarded with badges that can be showcased next to their in-game name for bragging rights. It's important to check the challenge list frequently and work towards completing the active challenges before the tour rotation ends to collect as many badges as possible.