Lorentz Invariance is a fundamental principle in the theory of relativity, stating that the laws of physics remain the same for all observers, regardless of their relative motion. This means that whether you are standing still or moving at a constant speed, the outcomes of physical experiments will yield the same results. This concept is crucial for understanding how time and space are interconnected. It implies that measurements of time and distance can vary depending on the observer's speed, but the underlying physical laws do not change. Thus, Lorentz Invariance helps unify our understanding of the universe across different frames of reference.