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  • Understitial Ad

    Understitial Ad

    The ad is located behind the content of the website and is released by scrolling.

    File format: The hosting of the understitial ad is done by BCN. All images must be delivered in the following three formats: 1280x1600, 640x920, 920x640 as redirects, JPG, GIF or PNG. The image data must be delivered in high resolution and as JPG.                                                                                                                                                   

    Max. file size: The file weight of 300 KB per image must not be exceeded.

    BCN - technical specifications


    Please make sure to deliver all information and creatives needed, 5 days prior to start of the campaign. Please send the following information to this e-mail address: bcn.campaigning(at)burda.com.

    • Advertiser name
    • Campaign name
    • Booking period
    • Booked pages or placement
    • Ad formats
    • Contact person

    Please send 3rd party redirects in a separate file as an attachment. All ad material provided has to be SSL-encrypted. Third-party tracking and view time measurements are allowed but must be SSL-encrypted. We allow tracking pixel and click counters but no JS pixel.



    • Please provide HTML5 formats only as redirects and send us additional fall-backs as images (JPEG, GIF or PNG).
    • All formats must be SSL-encrypted.
    • We do not support expandable ad formats.
    • Auto play is not accepted in any case. There must be a user interaction for example a mouse-over click to play the sound off the video.
    • Please be aware that we don't accept ads with a close button.
    • BCN uses a frequency capping for every campaign.



    HTML5 BCN accepts HTML5 formats only as a redirect. Please make sure to test every creative in all common browsers before sending them to us. The creator of the ad is responsible for browser compatibility. We don't recommend using a HTML5 converter. Please make sure to follow the guidelines of BVDW and IAB before sending the creatives to us. We allow redirects as <script> tags. If you use script tags, note that there is a higher risk of collision on the website as if you use <iFrame> tags. This is particularly the case when HTML5 codes are not properly implemented.  You can prevent that kind of problem by using procedures such as namespaces, prefixes and iframe enclosure. BCN therefore prefers and demands redirects to be delivered as <iFrame> tags.