# Statistical Significance: Definition & How it Works?

Statistical significance is a measure of the likelihood that a result is not due to chance, usually expressed as a p-value or confidence level.

**Why is statistical significance important? **

Statistical significance helps determine if a result is likely due to a real effect or chance, guiding decision-making and reducing false conclusions.

**An easy way to understand statistical significance is: **

Imagine you're testing two different ad designs. If the results show that one ad performs much better than the other, and it's not just due to random chance, that's statistical significance.