If the ad script from customers already performs the popup, then only the script part is cut from the code.
2. The selection of the type does not matter to the creative itself. Its purpose is to allow the publisher to exclude this type of creative.
The customer must also be clarified where (% viewredirect%) must be placed in its marketing material, tracking URL, so the view is counted if the customer indicates an advertisement.
The advertisement can be posted to pop / PopUnder / Layer surface or a script code can be generated through the code Center.