In the Career mode, you can proceed by gaining fans. There are 105* steps in the Career. As you increase your fans, you progress in the Career and get a reward at each step.
You can obtain rewards such as chests, new coaches, gold, diamond and equipments (shoes, jersey).
If you lose fans, your Career progress will also decrease. Rewards in each step can only be collected once, meaning that when you regain fans, you will not be able to collect the rewards you previously collected.
You can use fan boosts to progress faster in the Career.
*Can change with updates.