How do you increase your tier in Mario Kart Tour?

In Mario Kart Tour, increasing one's tier is achieved through participation in ranked cup competitions, which occur on a weekly basis. Players must compete in a series of races against others within their tier, aiming to accumulate as many points as possible from these races. Points are earned based on race performance, including finishing position, the number of actions performed like using items and performing stunts, and the level and rank of the chosen character, kart, and glider. At the end of each ranked cup period, players are ranked against others in their tier. Those who score among the top players will ascend to higher tiers, which not only offer greater challenges but also better rewards. It's essential for a player to strategically select their best drivers, karts, and gliders that correspond with the featured courses to maximize their point potential and improve their chances of tier advancement.