Mock data, or fictional data, refers to information that is created for testing or demonstration purposes rather than being derived from real-world sources. This type of data is often used in software development, data analysis, and training scenarios to simulate how a system would behave with actual data. It helps developers and analysts understand potential outcomes without compromising sensitive information. Creating mock data allows teams to visualize and interact with datasets without the risks associated with using real data. It can include various formats, such as names, addresses, phone numbers, and transaction records, ensuring that the data structure mimics real-world applications while remaining entirely fictional.