Hey @Manpreet_Dhindsa,
If you have allowEmptySearch set to true, navigating to a vertical on an empty query executes an empty search in order to return all results for that vertical.
If you set allowEmptySearch to false, navigating to a vertical on an empty query will not return any results, nor will it count towards a search. In order to return any results, a search has to be executed.
Best,
DJ