Most teams measure AI visibility as one blended score. New data across 3.7 million citations from ChatGPT, Perplexity, and Google AI Overviews shows why that's a problem: only 2.37% of cited URLs appeared across all three engines, while more than 91% showed up in just one.

In this episode, we unpack why presence is no longer enough and why portability, the ability of your content to travel across AI retrieval systems, is the metric search leaders should actually care about. We cover why guides and tutorials outperform homepages in cross-engine citations, why grounding answers is a different job than ranking pages, and a three-layer measurement model covering presence, portability, and concentration that you can bring into your next leadership meeting.

If your AI visibility looks healthy but rests on one engine's habits, you may be renting visibility rather than building it.