How does the test mode work?

The Test Mode is an option available in the Advanced tab of the plugin menu that allows you to test the application of the automatic internal links before actually changing the HTML presented to the visitors and search engines

More specifically, when the test mode is enabled, your automatic internal links defined with the AIL menu will be applied on the front-end only when the posts are visited by the logged-in WordPress users that have the capability specified with the AIL Menu option available in the Capabilities tab of the plugin options.

Please note the with the test mode enabled the statistics available in the Dashboard and Juice are generated as if the automatic internal links were actually applied in your website.