<ul data-eligibleForWebStory="true">Brownian motion is a random walk where each step is unpredictable, resulting in a jagged trail on a chessboard.Speeding up the process creates Brownian motion, where tiny steps lead to a continuous, irregular path.Brownian motion is essential because randomness is prevalent in various aspects of life like weather, stock markets, and molecular movements.It is a mathematical model for uncertainty, describing chaos and finding structure in unpredictable situations.