The Honest Truth: GSC Does Not Label AIO Impressions
Google Search Console does not currently expose a dedicated dimension for "this impression came from an AI Overview." Impressions, clicks, and average position are aggregated across every Search surface — blue links, featured snippets, People Also Ask, and AI Overviews — without a way to filter for AIO specifically. That makes the question "how much of my GSC traffic is being eaten by AI Overviews?" surprisingly hard to answer with GSC data alone. But there are workarounds.
Step 1: Identify AIO-Triggering Query Patterns
Google AI Overviews trigger most reliably for definitional queries ("what is X"), comparative queries ("X vs Y"), how-to queries ("how to do X"), and factual lookup queries. Filter your GSC queries to those patterns and treat them as your AIO suspect list. Most informational queries in those patterns now produce an AIO at least intermittently.
Step 2: Spot the CTR Collapse Signature
The most reliable signal that AIO has eaten your traffic on a given query is a sudden, sustained drop in click-through rate while impressions and average position stay flat or improve. If your query is still ranking in position 2 but CTR fell from 12% to 3%, AIO is the most likely culprit — users got their answer from the AI Overview and never clicked.
Step 3: Cross-Reference With a Live AIO Check
For each suspect query, manually search Google (in incognito, signed out) and check whether an AI Overview appears, and whether your domain is among the cited sources. This is tedious for more than a handful of queries, which is why most teams automate it with a tool like Presenc AI that runs queries against Google AI Overviews continuously and joins the results back to your GSC data.
Step 4: Build a "Shadow AIO Layer" on Top of GSC
Combine three data sources: (1) GSC impression and CTR data, (2) automated AI Overview presence checks for your top queries, and (3) automated citation extraction so you know whether you were cited or whether a competitor was. The combined view tells you, for every important query, whether AIO is triggering, whether you are cited, and what CTR impact AIO is having — which is what GSC alone cannot show you.
Step 5: Monitor Continuously, Not Just Once
AIO behavior changes weekly. Google iterates on which queries trigger AIO, which sources are cited, and how prominently the AIO is displayed. A one-time analysis is obsolete within weeks. Continuous monitoring is the only way to keep an accurate picture, which is why Presenc AI's AIO tracking module runs every priority query daily and stores the full history.