SSP

• Contextual SDA passed both quality tests we performed and described in this article
• The mechanisms we used to assess the contextual SDA signals’ quality were: SSPs’ audiences sent via Deal IDs and RTB House’s proprietary ContextAI engine

Have you heard of Seller-Defined Audiences (SDA) yet? SDA was released at the beginning of 2022 by Project Rearc – an initiative that came to life as the IAB Tech Lab’s answer to the impending demise of 3rd-party cookies. Although a year hasn’t passed since its release, SDA has received significant attention in the press and industry conferences and is considered one of the go-to solutions for targeting when the 3rd-party cookie pond dries up.

The process of advertising inventory purchasing has significantly evolved over the course of recent years. Another (r)evolution is right around the corner and it’s because of the deprecation of 3rd-party cookies.

Topics API has been discussed many times in the media at a conceptual level, but there are few detailed studies, especially showing the scale of availability of these signals in the browser. We will try to answer the question of what causes this.