This policy setting determines whether users will be prompted for non user-initiated file downloads. Regardless of this setting, ...

This policy setting determines whether users will be prompted for non user-initiated file downloads. Regardless of this setting, users will receive file download dialogs for user-initiated downloads.

If you enable this setting, users will receive a file download dialog for automatic download attempts.

If you disable or do not configure this setting, users will receive a file download dialog for automatic download attempts.