Link one: recommendation share, the leading indicator
The chain starts where the work happens: share of your category's tracked buying moments where assistants name you, measured monthly against a frozen basket across ChatGPT, Gemini, Claude, and Perplexity, per AI search tracking. This is the number your fixes move first, weeks before any revenue effect, which makes it the leading indicator that keeps stakeholders patient through the lag. Report it with its diagnostic layer attached, which moments flipped and which shipped fix the cited sources credit, because attribution begins at the answer level: a moment that flipped after your fix shipped, with your page among the citations, is causally yours in a way no click ever proves.
Link two: AI-referred arrivals, the middle of the chain
Recommended buyers arrive disguised: direct sessions to deep pages, branded searches for a name they just heard, the occasional tagged referral from assistants that link out. Build the composite view from AI traffic analytics, assistant-referral segments, branded search trend, new-visitor direct sessions to money pages, and the one signal nothing else replaces: a how-did-you-hear field with an AI assistant option on every high-intent form. The validation test is correlation with lag: link one's share curve should lead link two's arrivals curve by two to six weeks. When the curves move together across two quarters, you have what most channels never get, a visible causal chain from work to demand.
Link three: tagged pipeline, where the CFO lives
Tag every self-reported AI arrival in the CRM and follow the cohort: close rate, deal size, cycle length against other sources. Then report one number upward, pipeline per point of recommendation share, computed quarterly, alongside the two curves that produced it. Teams running this chain consistently find AI-referred cohorts close faster and larger, they arrive pre-sold by a recommendation they trusted, which is what finally reframes GEO spend from experimental to efficient in budget conversations. The full scoreboard, including what to do when a link breaks, is in how to know if your GEO is working, and the leads-side mechanics in inbound leads from AEO and GEO. Build all three links before anyone asks, because the meeting where you need this chain is never scheduled in advance.