Blobs, also known as binary large objects, are a type of data storage used to store unstructured data such as images, audio, and video files. They are typically stored in a database management system (DBMS) or a file system, and are represented as a sequence of bytes. Blobs are different from structured data, which is stored in a specific format and can be easily searched, sorted and processed using SQL. Blobs are considered as unstructured data and can be stored in any format and its hard to make sense of it without proper context. Blobs are often used to store multimedia files, such as images and videos, but they can also be used to store other types of data, such as serialized objects or documents. Some database management systems, such as MySQL and PostgreSQL, have built-in support for storing and managing blobs.