Programmatic media enables the automation of the digital advertising delivery process. This implies that advertisers are able to direct their spending directly to the audiences most prone to a particular action (engagement); a purchase, for example. Given this targeting and the advanced customization capabilities of ad delivery, programmatic media spending has grown significantly in recent years, to the detriment of other more traditional media. However, the market shows concerns regarding the transparency of the buying process and the control of the results achieved with its investments. This research aims to raise topics that reveal signs of problems in the use of programmatic media and produce a ranking with these topics. Through an international bibliographic review, 10 topics that indicate problems and through the Delphi method, using a sample of 15 experts working in Brazil, 9 new items were identified as problems or challenges in the use of this tool. A consensus analysis and a ranking were produced to identify the most relevant problems, in order to prioritize actions in the search for solutions.