If the wheel lands on the Max Win symbol during the Wheel Feature, the Max Wheel feature is awarded, and the number of Free Spins count is displayed in the inner wheel. The amount of coins each MAX Wheel symbol rewards for every Free Spin goes up. For example, for the 1st free spin, each MAX Wheel symbol would reward X coins. For the 2nd free spin, each MAX Wheel symbol would reward X+Y coins. So on and so forth.
Note that QUICK WIN symbols are useless in this feature and do nothing, and they don't trigger Jackpots.