AI Accuracy Issues in PPC Strategies Uncovered by New Study

A new study reveals significant inaccuracies in AI responses regarding PPC strategies, leading to concerns for advertisers.

Key Points

  • • 20% of AI responses for PPC strategies were found to be inaccurate according to a WordStream study.
  • • Google Gemini had the highest accuracy with a 6% error rate, while Google AI Overviews had the lowest at 26%.
  • • ChatGPT reported a 22% error rate and Meta AI 20%, indicating varied reliability across platforms.
  • • The study urges advertisers to verify AI-generated advice through multiple sources to ensure more informed decision-making.

A study by WordStream released on July 10, 2025, has raised significant concerns about the accuracy of AI-generated responses related to pay-per-click (PPC) advertising strategies. The research, which analyzed 225 AI responses from five leading platforms—Google Gemini, Google AI Overviews, ChatGPT, Meta AI, and Perplexity—found that 20% of the responses contained inaccuracies, highlighting the potential risks for advertisers reliant on such tools.

Among the platforms tested, Google Gemini achieved the highest accuracy with only 6% false responses, while Google AI Overviews had the lowest success rate, presenting an alarming 26% error rate. ChatGPT and Meta AI exhibited error rates of 22% and 20%, respectively, while Perplexity performed slightly better with a 13% inaccuracy rate. This discrepancy in performance raises serious questions about the dependability of these AI solutions in critical advertising decisions.

The study's findings are particularly pertinent as Google AI Overviews appear in 55% of search results, potentially guiding millions of advertisers with outdated or incorrect information. The research emphasizes the importance of validating AI-generated advice through multiple sources, reinforcing that while AI can assist in managing PPC campaigns, it cannot substitute for human expertise or thorough scrutiny.

As reliance on AI tools in advertising grows, the call for accuracy becomes increasingly crucial to safeguard advertising budgets and ensure effective campaign performance.