Extension of the (desktop) halfpage ad into the mobile understitial.
Please note the following for redirects and HTML5 advertisements: When using redirects, please ensure that the delivered scripts only return a static image in the specified size. In the case of responsive elements, make sure that 100% of the available space is filled in. This also means that the scripts do not make any changes to the HTML elements that were not created by the scripts. The positioning, calculation and other necessities are carried out by the publisher.