It would seem that there a discrepancy has emerged between Google’s official stance on API-based placement exclusions and real-world observations, particularly within Performance Max (PMax) campaigns. While Google maintains that API-based exclusions don’t function for PMax, numerous advertisers have reported successful implementation of these exclusions. This contradiction creates uncertainty for advertisers managing campaigns programmatically, as they rely on APIs for efficient and scalable operations.
The confusion stems from a Google advisor’s statement on the official help forum, asserting that placement exclusions are not supported in PMax campaigns. However, recent testing by automation expert Nils Rooijmans has demonstrated that API-originated placement exclusions indeed function effectively for PMax campaigns, directly contradicting Google’s official position. Furthermore, another advertiser within the help forum has confirmed their ability to successfully add exclusions through their API.
This inconsistency between Google’s stated policy and actual functionality has significant implications for advertisers. The ability to effectively exclude placements is crucial for maintaining campaign safety and brand protection. If exclusions are not being implemented as intended, advertisers risk their ads appearing on inappropriate or undesirable websites, potentially damaging their brand reputation.
This situation underscores the importance of clear and accurate information from platform providers. The discrepancy between Google’s official documentation and the actual behavior of their platform creates confusion and hinders efficient campaign management. Advertisers now face the challenge of navigating this uncertainty while ensuring their campaigns adhere to their desired brand safety and placement guidelines.
The documented behavior suggests that Google’s official stance on API-based placement exclusions for PMax campaigns may require updating. It appears that these exclusions function similarly to those implemented through the user interface, albeit with potential variations in implementation details.