Which function does the Data grid widget primarily serve in the context of invoices?

The Data grid widget primarily serves the function of displaying extracted data in the context of invoices. This widget is designed to present data in a structured manner, allowing users to view and interact with the information stored in the application. In the case of invoices, this could include displaying various details such as invoice numbers, amounts, dates, and customer information.

By utilizing the Data grid, developers can create a user-friendly interface that allows for easy browsing, sorting, and filtering of invoice records. This aspect enhances data visibility and access, making it easier for users to analyze and manage invoice-related information. The focus on displaying extracted data reflects the widget's purpose in making relevant information readily available to users without any additional processing or complexity involved.

The other functionalities listed, such as uploading images, generating reports, and storing entity relationships, fall outside the primary goals of the Data grid widget. While those tasks may be important in different contexts, they do not encapsulate the main role of the Data grid in managing and presenting data effectively.