Final answer:
Global variables provide an easy way to share large amounts of data among all the functions in a program.
Step-by-step explanation:
Global variables provide an easy way to share large amounts of data among all the functions in a program. They are variables that are declared outside of any function and can be accessed and modified by any function within the program. For example, in a program that calculates the area of different shapes, a global variable could store the total area calculated so far and be updated by each function that calculates the area of a specific shape.