XML files play a crucial role in loading data into PrestaShop 1.7, facilitating efficient product management and customization. These XML files contain structured information about products, categories, attributes, and other essential details. By importing XML files through PrestaShop's built-in Import/Export tool or dedicated modules, merchants can seamlessly update product catalogs, manage inventory, and synchronize data with external systems. This method simplifies bulk data updates, ensures accuracy, and expedites the process of keeping an online store's offerings current and synchronized with inventory databases. With XML file integration, PrestaShop 1.7 empowers businesses to maintain a dynamic and streamlined online presence while minimizing manual data entry efforts.