Which of the following statements is true regarding ad visibility in Performance Max campaigns?

The statement regarding ad visibility in Performance Max campaigns that is accurate pertains to their optimization across all Google properties. Performance Max campaigns are designed to leverage machine learning to drive performance goals across various Google channels, including Search, Display, YouTube, Discover, and Gmail. This cross-channel optimization allows for a more comprehensive reach and maximizes the effectiveness of ads by adapting to where users are most likely to engage with the content.

The other options reflect misunderstandings about how Performance Max campaigns function. For example, these campaigns are not limited to Google Search alone; they are intended to provide visibility across various platforms. While they do offer targeted capabilities based on defined audience signals, they also automate and broaden targeting to reach more potential customers. Additionally, for Performance Max campaigns to run effectively, having a product inventory is typically necessary to showcase items efficiently, contrary to the claim that they do not require it. Thus, the focus on optimization across all Google properties is a key aspect that strengthens the overall strategy and effectiveness of Performance Max campaigns.