Thank you for your reply.
You would need to delete all the placeholders that you do not wish to have, you can do this within the Ezoic Ads section of the Ezoic dashboard. However, this will affect the revenue you are making.
If you wish to create placeholders in a specific location the best way would be to use the Chrome extension. You can find more information on this here.
If you are concerned about the number of adverts being displayed you can set your revenue focus to be more user orientated. You can do this in settings.