The role of ATP (adenosine triphosphate) in cellular metabolism is to serve as the primary energy currency of the cell. ATP stores and transports chemical energy within cells, enabling various biological processes, including muscle contraction, cell division, and biosynthesis. When energy is needed, ATP is hydrolyzed into ADP (adenosine diphosphate) and inorganic phosphate, releasing energy that can be harnessed for cellular functions. This process is vital for maintaining life and overall cellular activity.