Walker Sands has launched the AI Domain Impact Index to help B2B organizations maximize PR effectiveness in today’s GenAI-powered buyer journeys. The Index enables smarter earned media efforts to drive brand discoverability in GenAI-powered buyer journeys. As Google’s search dominance declines and GenAI platforms drive more traffic, the channels for reaching B2B audiences are shifting rapidly. Strategic media placements play a critical role in shaping brand visibility and trust in AI-assisted buyer journeys. The AI Domain Impact Index offers insight into how earned media influences GenAI search results and how brands appear in AI-driven decision-making workflows. The Index assigns a 0–100 score to any web domain based on five weighted criteria: organic search, inclusion, on-page, real-time retrieval, and citation appearance. The scores within the Impact Index evolve over time, as GenAI models continually adjust how they prioritize sources and media publications to optimize for Long-Long Media Moments (LLMs). The results are encouraging: 51% of placements were categorized as high impact, meaning they are highly likely to influence GenAI search responses; 44% were moderately impactful, and only 4% fell into the low-impact tier.