Decimal odds are a multiplier that you apply to your bet amount to determine the amount that you would receive if your bet wins.
Example: If you bet $100 USDC on odds of 1.50, your bet would return $150 USDC if you win ($100 USDC x 1.50 = $150 USDC). The $150 USDC returned would include your original $100 bet + $50 of profit.