Ströer technical global specifications

General information

Requirements

Technical Specification	Specifications
Protocol	All components of the ad, especially tracking pixels and external ad-server systems (redirects), must be invoked using the HTTPS protocol. Using HTTP results in tracking differences.
Load	On the side of the user, the presentation of the ad-media may not generate more than a 30% CPU load increase.
File size	The maximum file size of an ad takes into account all files related to the ad, including all common libraries (e.g.: jQuery, Adobe Edge). Calculation of the total size takes place following compression of all files through GZIP.
Requests	The maximum numbers of requests  are 15 for the Initial Load and 85 for the Sub Load.
Audio/Video	This content may be launched only following interaction of the user with the ad. The user must be able to control the playback of this media at any given time using control elements in the ad.
Expansion/Interaction	When using interactive and/or expanding surfaces in your ad, these may be launched only following interaction of the user with the ad. We will automatically include an easily visible Close button in your ad.
Functionality	Please ensure that the creative redirects don't cause any javascript errors. For example 404 or synthax errors.
GDPR Guidelines	In general we follow the technical specifications for the GDPR Transparency & Consent Framework.  Examples for a general implementation (Javascript) : https://github.com/InteractiveAdvertisingBureau/Consent-String-SDK-JS
Heavy Ad Interventions in Google Chrome	With Chrome 86, Google starts blocking ads that are resource-heavy and use an egregious amount of CPU or network bandwidth. This happens as an reaction to consumers are increasingly frustrated with ads that disrupt their experience, interrupt content and slow browsing. In order to avoid such a blockage of the creative we recommend to consider the restrictions/guidelines from Google: https://developers.google.com/web/updates/2020/05/heavy-ad-interventions

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Delivery

Technical specification	Specifications
Delivery timeframe	3 days prior to start of the campaign, for fix placements/events 5 days prior to start of the campaign
Protocol	HTTPS always required
Audio & Video content	allowed, launch by user action only (MouseOver)
Expansion / Interaction	allowed, launch by user action only (MouseOver)
CPU load	max. 30% increase in load

Deliver all ads to the following email addresses:

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AcceptableAds

AcceptableAds is a programme of some AdBlocker providers that permits ads subject to specific quality guidelines and in spite of an AdBlocker being active.
The following information only applies if you have explicitly ordered a product that participates in the AcceptableAds programme.

Follow this link to learn more about the AcceptableAds programme.

 

Technical specification	Specifications
ad formats	Only IAB Universal Ad Package +  HalfpageAd: Leaderboard, Skyscraper, Widesky, Medium Rectangle, Halfpage Ad possible
animations/videos	not allowed, ads must be completely static (no moving images)
sound	not allowed
loading indicator	not allowed

Note Digital Services Act

Due to the requirements of the Digital Services Act, ads in the top left or right corner are automatically marked with an overlay by the ad server.

Therefore, when creating the advertising material, please ensure that no important information or images are included in the top two corners of the advertising material.

Media Guidelines

File size

Technical specification	Purpose
max KB "Initial Load"	siehe format specifications
max KB "Subload"	2 x KB of "Initial Load"
max. KB "User Initiated Load"	unlimited

Guidelines to the loading procedure

It is customary in the industry that all ads can use 3 points in time to load their files: "Initial Load", "Subload", "User Initiated Load".

At each of these points, the ad can load a limited amount of data. These limits depend on the format to be served, larger-scale formats have higher limits.
The purpose of these limits is to present the user with an initial, visible portion of the ad as soon as possible. "Heavy" images, videos, and interactive elements are not loaded until the website is fully available to the user.

All file sizes include all trackings.

Intial Load:

Can be executed immediately upon loading the ad.
Includes all files that the ad requires to ensure an initial graphical presentation parallel to the loading process of the website.

Until the hosting website sends the "DOMContentLoaded", all loading processes of an ad are considered part of the "Initial Load".
At this point, the ad can only execute requests for additional resources (images, JavaScript, tracking, etc.).

Subload:

May be started one second (1000 ms) after the Browser Event "DOMContentLoaded" of the serving website (previously Polite Download).

Usually includes the main portion of the ad (complex animations and images, interactive elements).
The maximum file amount at this time is double the initial load (Initial Load x 2) and there is no limit on file requests.

User Initiated Load:

This is defined as the time when the user interacts with the ad (touch, click, mouse-over).
An unlimited file amount may be loaded and there is no limit on file requests.

Videos and audio files are typically loaded at this time.
On mobile devices, note that the ISP typically provides a limited data connection. This connection should be burdened to the lowest possible degree.
The users whose connections are being burdened are your potential customers.

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HTML5

Technical specification	Specifications
Format	Delivery as index.html with complete HTML syntax (Doctype definitions, <head>, <body>, etc.).
Scripts	Additional content (scripts, CSS, etc.) can be delivered in separate files. Optimise the number of additional files as far as possible and minimise each file. Each additional file loaded has an adverse effect on the performance indicators of your ad (decreased visibility, fewer clicks).
External resources	When linking external resources, make sure that their servers permit cross-domain access. Additional information on cross-origin resource sharing (CORS) can be found here.
ID-Definition	In order to avoid conflicts with other banners and the serving website, always use a name-prefix when defining CSS classes and element IDs.
Display orientation	The orientation of the displaying device should be considered, and the ad should be optimised for "landscape" and "portrait" orientation.
Tracking	The tracking/counting of user actions (except for clicks) through separate server must be conducted by the ad producer. If the IAS Tracking is used, the programming of the html document must pay attention to the implementation of IAS. The technical specifications of the IAS must be adhered to and we cannot assume any liability for their correctness.
Motion sensors	Data from the motion and orientation of a mobile device may be read and used for the interaction of the ad but may not be used in a blocking capacity. Functions such as closing or minimising of ads should not be exclusively dependent on the motion of the device but must rather always be controllable through additional buttons / gestures.

JavaScript

Specification	Notes
Preparation	Prior to loading JS libraries and frameworks (jQuery, ZeptoJS, etc.), you must check whether an instance of the framework has already been loaded and is active on the website.
Framework	Use small, compact JS frameworks. Larger libraries such as jQuery are generally unnecessary and increase the data load of the ad.
Code size	Minify your final JS code as far as possible. Use Minifier or similar tools so that your ad can be transmitted to the viewer as fast as possible.
Variables	Generally, avoid using globally defined variables and functions and store these in a separate "namespace".
document.write()	Using document.write() is not permitted. Ads using this method will be automatically blocked.
Mobile Formats	For mobile ad formats intended for display in an app we support the standardised  API MRAID (Mobile Rich Media Ad Interface Definitions) of the Interactive Advertising Bureau (IAB). For access to mobile device functions, e.g.: Creating a calendar entry, the device must be MRAID compatible.

 

Click measurement

You can measure clicks on your ad through the Ströer AdServer. To achieve this, a dynamic assignment of the link URLs must be enabled in the HTML5 ad.
You will find instructions for inserting the dynamic assignment, including code examples, in the public GIT repository of the Online Marketing Group (OVK) in the Federal Association for the Digital Economy (BVDW). 

The instructions are supported by all German marketers. After the one-time integration, the click measurement works on all German websites with no further adjustments required.

When developing / testing your ad, you can simply pass the URL-encoded links (encodeURIComponent() ) to the call of your .html file:
ihrWerbemittel.html?clicktag1=http%3A%2F%2Fwww.ihreUrl.de&clicktag2=http%3A%2F%2Fwww.ihreAndereUrl.de

 

Animations

Technical specification	Specifications
Creation	Animations should be designed as resource-efficiently as possible. Avoid the overuse of transparency effects (opacity), or triggering "repaints" of a browser. See additional information on paint/repaint here.
GIFs	Rather than simply hiding them, completely remove unused GIFs (e.g. loading animation) from the HTML tree. Hidden animations continue to burden the browser.
Animations	Use the animation capacities of CSS3 (animation, keyframe, translate, etc.). Do not, under any circumstances, use animations through JavaScript' s setInterval() or setTimeout(). As a rule, JavaScript animations should use the browser's requestAnimationFrame-API. See additional information on requestAnimationFrame() here.

 

Images

Technical specification	Specifications
Formats	GIF,PNG,SVG,JPEG
Pixel density	To display optimally on all devices, all images should be adjusted for HDPI. See additional information on screen sizes and pixel density here.
Compression	The compression procedures/formats  progressive JPEG / progressive PNG and SVG are perfect for maintaining a low data load of the ad in spite of HDPI.
Amount	Use the triggering of server requests for small images very sparingly. If you want to use numerous small image files (icons, logos), these should either be loaded as CSS sprites or stored directly in the HTML as DataURI.
Integration	In order to serve individual versions of images to the respectively correct device and/or at the respectively appropriate pixel density, we recommend using CSS3 image-set() or <img>'s srcset element (check browser support).

 

Videos

Mandatory information

Ads with video/audio content must, at any given time, include 3 well-visible and immediately clickable buttons (stylised or as text):

• Stop
• Pause/Play
• Audio on/off

Technical specification	Specifications
Format	MP4, optional: WebM, and Ogg (see Browser Support https://www.w3schools.com/html/html5_video.asp)
Frame rate	25 FPS
Max. file size of a video	Click-to-play: max. 5 MB Autoplay: max. 2,4 MB
Integration	Use the video API of the browser to integrate videos.
Loading options	Version Click-to-play Videos may only be started and played following a user action (clicking on a 'Play' button, swiping to expand the ad). The video file may only be downloaded when the user starts the video or when the 'subload of the ad' has been triggered. Automatic starting of the video without a clear action by the user is not permitted. Autoplay The video file may only be downloaded after the 'subload' of the advertisement has been triggered. The audio of the video must be set to 'Off' by default and may only be activated through user interaction.
Max. length of spot	max. 30 s
Repeated playback	Video may be played a maximum of 2x.  Following that, the video must stop automatically.

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Instream Video

Info

A lead time of at least 5 business days prior to the delivery date of the ad applies.

The email for the ad delivery should include the following information:

Customer name, campaign name, campaign schedule, advertising medium, assignment of ads for individual placements and point of contact for questions.

 

Please note that if the delivery of ad content is delayed or does not meet the technical specifications, in order to achieve the contractually agreed goals Ströer Digital Media  reserves the right to delay the campaign by the number of days that the delivery was late.

 

General

Technical specification	Specifications
Delivery	As a video file or as 3rd party redirect via the VAST3.0 wrapper mechanics. When you provide a Redirect delivery, make sure that only a maximum of three redirects to subsequent AdServers are carried out.
Max. length of spot	30 s for a Pre-Roll, Mid-Roll and Post-Roll, 6 Seconds for Bumper Ad
Playback	The video material should start immediately in the first frame, empty frames at the beginning or end of the commercial are to be avoided.

Physical delivery for Pre-Roll, Mid-Roll, Post-Roll and Bumper Ad

Technical specification	Specifications
Container	mp4
Resolution	1280x720 (CCIR601/DV PAL)
Frame Rate	25 or 30 frames
Audio	48 or 44 kHz, 16 Bit, Stereo
Conversion	H.264
Aspect Ratio	16:9
Max. file size	100 MB
Max length of spot	6 Seconds for Bumper Ad and up to 30 Seconds for Pre-Roll, Mid-Roll and Post-Roll
Sound	Please observe loudness norm EBU R 128. The sound must be integrated in the video
Playback	The basic material should start immediately in the first frame; black images at the beginning or end of the commercial are not permitted.
Components	tracking pixel (no JS pixel) and click counters (Click Through Tracking Pixel)
Note	Please send a download link for files > 10 MB. When booking TubeOne, only 3rd-party trackings from certified partners (https://developers.google.com/third-party-ads/adwords-vendors?rd=1) may be used.

 

3rd-party delivery (VAST 3.0) as well as programmatic / real-time bidding on Ströer SSP for Pre-Roll, Mid-Roll, Post-Roll and Bumper Ad

Technical specification	Specifications
Format	MP4 is mandatory, additionally optional:  MOV, WebM, MPEG (RTB bid responses must correspond to the MIME types displayed in the respective bid request)
VPAID	Only VPAID JS upon request (please note that the range is limited when only a single VPAID format is delivered). IMPORTANT: The ad video may not be superimposed on the controls within the video player. Ad videos (e.g. PreRolls) must always include clickable buttons with  Stop, Pause/Play, Audio on/off.
Protocol	Deliver trackings and media files secured and non-secured.
Resolution	preferrably 640x360 (MEW / App) and 1280x720 (Desktop / CTV). Similar Resolutions are also possible. Similar Resolutions are also possible. Please make sure to provide media files for different screen sizes as for smalle ones (MEW/APP) aswell as bor bi Screens (Desktop/CTV).
Bit rate	min. 600 kbps to max. 2.000 kbps (MEW / App), min 1.000 kbps to max. 4.000 kbps (Desktop) an dmin. 4.000 kbps to max. 15.000 (CTV)
Max. length of spot	30 seconds for Pre-Roll, Mid-Roll, Post-Roll and 6 seconds for Bumper Ad
Max. file size	4 MB for Web Environments.
Audio / sound	Please observe loudness norm EBU R 128. The sound must be integrated in the video.
Wrapper level	max. 3
3rd-party	On the basis of VAST 3.0 tag (Digital Video Ad Serving Template) via Doubleclick, Adform, Mediamind, Flashtalking, Adition etc. VAST guidelines according to IAB: www.iab.net

 

Delivery for Divimove (YouTube Artists) Pre-Roll and Bumper Ad

Technical specification	Specifications
Files Hosting	Physical upload from Stroeer or wrapper URL (only if hosting of creative in Google AdManager or YouTube)
Format	MP4 is mandatory, additionally optional:  MOV, WebM, MPEG (RTB bid responses must correspond to the MIME types displayed in the respective bid request)
Protocol	Deliver trackings and media files secured
Resolution	preferrably 640x360 (MEW / App) and 1280x720 (Desktop / CTV). Similar Resolutions are also possible. Please make sure to provide media files for different screen sizes as for smalle ones (MEW/APP) aswell as bor bi Screens (Desktop/CTV).
Bit rate	min. 600 kbps to max. 2.000 kbps (MEW / App), min 1.000 kbps to max. 4.000 kbps (Desktop) an dmin. 4.000 kbps to max. 15.000 (CTV)
Max. length of spot	30 seconds for Pre-Roll, Mid-Roll, Post-Roll and 6 seconds for Bumper Ad
Max. file size	4 MB for Web Environments.
Tracking Pixels	Onnly Google certificated third party providerws → currently: comScore, DoubleVerifiy, IAS, MOAT, Nielsen, Kantar, Research Now and Google (incl. Ad Manager)

Ströer Tracking Guidelines

Here you find the Ströer Tracking Guidelines