What is the main advantage of a named credential?

The main advantage of a named credential is that Salesforce handles the authentication for you. Named credentials are a powerful feature that streamlines the process of managing authentication and authorization for external systems when integrating with Salesforce. Instead of requiring developers to manually code and securely manage credentials in their applications, named credentials allow you to define the endpoint and specify the authentication mechanism in a centralized place within Salesforce.

This centralization enhances security by reducing the exposure of sensitive information, as the credentials are stored securely in Salesforce and not hard-coded in the integration logic. Furthermore, using named credentials simplifies the process, enabling developers to focus on the integration logic itself rather than the intricacies of managing authentication protocols and securing credential information.

The other choices do not correctly represent the role and benefits of named credentials as effectively as this option does. For instance, named credentials do not allow users to manually enter credentials, nor do they eliminate the need for API calls or provide unlimited data storage. Their primary function is to manage authentication seamlessly, enhancing both security and ease of use in integrations.