A zettabyte is a unit of digital information storage that equals one sextillion bytes, or 1,000,000,000,000,000,000,000 bytes. To put it in perspective, a zettabyte is equivalent to about one billion terabytes, which is a common measure for large data storage systems. The term is often used to describe the vast amounts of data generated and stored in the digital age, such as the information processed by cloud computing services and social media platforms. As technology advances, the total amount of data in the world is expected to reach several zettabytes, highlighting the growing importance of data management.