Measurements of the value change in options due to changes in different variables; such as:

Delta: The change in option value per $1 change in the price of the underlying stock.
Gamma: A measurement of the change in an option’s delta relative to a 1 point move in the stock price
Theta: Measures how much time value decreases when one day passes without movement in either price or volatility; also known as daily decay.
Vega: Measures the price change in option premium per 1% change in volatility
Rho: Measures the effect of changes in interest rates on the value of an option