Data Validation is a process used to ensure that the data entered into a system is accurate, complete, and reliable. It helps prevent errors by checking the data against predefined rules or criteria. For example, if a user is filling out a form, Data Validation can ensure that the email address entered follows the correct format or that a required field is not left blank. This process is crucial in various fields, including software development and database management, as it helps maintain the integrity of the data. By implementing Data Validation, organizations can make better decisions based on trustworthy information, ultimately improving their overall efficiency.