Option Greeks are a set of risk measures used to assess the sensitivity of an option's price to changes in various factors, including underlying asset price, volatility, time to expiration, interest rates, and dividends. The five primary option Greeks are Delta, Gamma, Theta, Vega, and Rho, each measuring a different aspect of an option's risk exposure and pricing behavior. Delta represents the rate of change in an option's price relative to changes in the price of the underlying asset. Gamma measures the rate of change in Delta, indicating the option's sensitivity to changes in the underlying asset's price volatility. Theta measures the rate of decline in an option's price over time due to the passage of time or time decay. Vega measures the sensitivity of an option's price to changes in implied volatility, reflecting the impact of volatility fluctuations on option premiums. Rho measures the sensitivity of an option's price to changes in interest rates, indicating how much the option's price will change for a one percent change in interest rates. Option Greeks help investors and traders understand the risks and potential rewards associated with options trading, allowing them to make informed decisions regarding option strategies, portfolio management, and risk mitigation techniques.