For queries the Overview answers fully, clicks fall toward zero, because the searcher already has what they came for and has no reason to visit your page. Being cited in that Overview gives you visibility, not visits. Traffic survives only for the queries whose real answer needs more than the summary can hold. This is the honest outcome, and because AI Overview behavior is still shifting, the magnitude is worth confirming, but the direction is not in doubt.
Start with the zero-click reality. When the Overview states the complete answer, the click that used to come to your page often does not happen, even if your page is the source the answer was built from. The information transaction is finished at the top of the results, and the visit it used to generate is gone. Pretending otherwise does not help you plan.
Citation is real but it is not traffic. Being named as a source puts your brand in front of the searcher and may build recognition or trust over time, which has value, but it is visibility, not visits. Counting a citation as if it were a click overstates what you are getting and leads you to optimize for the wrong outcome.
What survives is the set of queries the summary cannot finish. Where the genuine answer requires depth, judgment, a tool, a worked example, the ability to act, or detail beyond a short paragraph, the Overview can give a starting point but not the whole thing, so the searcher still clicks through to get what they actually need. Those queries keep sending traffic. The ones a paragraph fully satisfies largely do not.
The practical task is to know which of your queries fall on which side, because that tells you where the traffic is exposed and where it is durable. Go through the queries your pages rank for and sort them by how completely a short Overview answer would satisfy the searcher. The ones a paragraph fully resolves are your most zero-click-exposed, and the ones that demand more than a summary are where your traffic is safest, plan accordingly.