Seller Defined Audiences (SDA) are audience segments sourced and managed by publishers or media owners using their own first-party data. This can be the declared preferences, content consumption or site behaviour of their users or customers.

Seller Defined Audiences are provided with bid requests to BidTheatre DSP, making the signal and reach stronger than third-party audience data that relies on third-party cookies.

To see which publishers offer Seller Defined Audiences, navigate to Supply → Seller Defined Audiences:
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Use the search bar to perform a free-text search for domains you’re interested in, or use the filter function to narrow results by your desired taxonomy or audience segment.

Go to Supply —> Audiences —> New Audience. Start by giving your audience a name, then select the advertiser for whom the audience is intended.

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Fixed CPM – To use a custom audience, you need to assign it a price to ensure that the cost is included in the campaign’s Max CPM and budget. Select 'Automatic' to let the platform set this automatically based on the audiences you select. Choose 'Manual' if you prefer to set a custom price (most often used when audiences are sold to other seats).

Note: If Fixed CPM is left blank, the cost of using the audience will not be deducted from the campaign budget but will instead appear as an additional charge on the invoice.

Limit to country – If you want to restrict the audience to a specific country, you can select it here. Otherwise, leave this field blank.

After clicking "Create", you will see this view appear, with several target options. Select “User - Seller Defined Audiences - IAB 1.1” under TYPE, and then choose your desired audience segment under VALUE. Click the “Create” button to add it.
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Your audience is now ready to be used in a campaign.
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For more advanced custom audience settings, please refer to the article “Custom Audiences” for more information on how to work with conditions such as OR, AND, and AND NOT.

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