An exabyte is a unit of digital information storage that equals one quintillion bytes, or 1,000 petabytes. It is often used to measure large amounts of data, such as the total data generated by the internet or the storage capacity of massive data centers. To put it in perspective, one exabyte can hold about 250 billion DVDs worth of data. As technology advances, the need for exabyte-scale storage is increasing, especially in fields like big data, cloud computing, and artificial intelligence.