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If there are specific pages where only a subset of the ads are shown, it is important to declare the ad tags, that are used in the current page. If ad tags are not properly declared, ad units will be auctioned, even if not used. This will lead to false ad impressions, negatively affecting page performance and user experience.
You can declare ad units using the snigelPubConf element.

Please remember:

• ad-unit-name: topleaderboard

• div-name: adngin-topleaderboard-0

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