The Growth Fund is a reward track where you can earn additional rewards for levelling up. 

There are three different reward tracks:

• Basic

• Deluxe 

• Royal

The Basic Track has already been unlocked for you, the Deluxe and Royal Growth Funds can be purchased and then you will be able to claim these additional rewards.

There are a total of 11 rewards for you to claim per track, with the final reward being unlocked when you reach level 45.