What metrics should I track for GEO?

GEO has both leading indicators (signals that predict future citation) and lagging indicators (results that show current citation). Track both — leading indicators tell you whether your inputs are right before results materialize; lagging indicators confirm results are happening. Here are the five metrics that matter most.

Metric 1: Citation score (leading and lagging)

Your citation score is the percentage of your defined test queries that result in your business being cited in AI responses. Run 10 consistent queries across ChatGPT, Perplexity, and Google AI Overviews monthly. If you're cited in 3 of 10 queries, your citation score is 30%. Track this number and watch it trend upward as your GEO work takes effect. This is the most direct GEO metric available.

Metric 2: Brand mention count (leading)

Monitor your Google Alerts to count how many times your business was mentioned on the web in the past month. Brand mention volume is a leading indicator for AI citation: as your web presence grows, citation probability grows with it. Month-over-month growth in mentions means your authority is compounding. A flat mention count for 3 consecutive months signals a problem with your visibility-building activities.

Metric 3: AI referral traffic (lagging)

In GA4, track the number of sessions arriving from AI platforms as referral sources — perplexity.ai, chatgpt.com, and similar. This is a lagging indicator: it shows you that AI citation is actually driving traffic to your site. Even small numbers here are significant, because AI referral traffic tends to be high-intent (users who received a recommendation and acted on it).

Metric 4: Google review count and recency (leading)

Track your total Google review count and the date of your most recent review monthly. Review volume and recency are direct inputs to AI citation probability. If review accumulation stalls for more than 2 months, your citation authority in AI search starts to erode relative to competitors who are still actively earning reviews.

Metric 5: Google AI Overviews impressions (lagging)

In Google Search Console, check the Performance report for AI Overviews impressions and clicks if the filter is available in your account. This directly measures your presence in one of the three major AI citation surfaces and shows you which queries are generating AI Overview exposure for your site.