Athena is the symbol of the highest value (the gods), rewarding you to bet 5 on the payline with a 5x line. The laurel wreath wild symbol is the most valuable. There are 5 your strands on the payline 5, which can also replace all symbols except the one.
The Zeus free game feature gives you 9 Zeus free spins, starting at 1x multiplier. After every 3 free spins, Zeus increases the multiplier by 1 means that a free spin of 4 to 6 will be affected by a 2x multiplier, while a free spin of 7 to 9 will be affected by a 3x multiplier.