How does the structure of glycogen relate to its function?

Glycogen is a polysaccharide with many branches, these branches increase the available surface area for enzymes to hydrolyse the substrate. glycogen is used as a storage of glucose which allows for fast energy release when needed and is present in muscle tissue. The structure relates to the function as many branches allows for rapid hydrolysis to provide high levels of glucose more quickly, which allows for more respiration during exercise etc.