XML Processing refers to the methods and techniques used to read, manipulate, and transform XML (eXtensible Markup Language) data. It involves parsing the XML document to access its structure and content, allowing applications to extract or modify information as needed. There are various tools and libraries available for XML Processing, such as DOM (Document Object Model) and SAX (Simple API for XML). These tools help developers handle XML data efficiently, enabling tasks like data validation, transformation, and storage in different formats, such as JSON or HTML.