Measuring AI search
How can a law firm measure traffic and cases from AI search?
Where AI search shows up in your data, where it doesn't, and the four measurements that together give a law firm an honest monthly number.
By Santiago Alvarez, Founder, Ad Hoc Digital
Last updated
The short answer
If you read one part of this page, read this.
Measure it from four sides: visits in GA4's AI Assistant channel, Copilot citations in Bing's AI Performance report, a fixed list of client-style questions asked of the AI tools every month, and an AI option on your "how did you hear about us?" question. Then count the signed cases those leads became in your CRM.
Expect the total to be a floor, not the full picture. Google counts clicks from AI Overviews and AI Mode as ordinary organic search, and many people read a firm's name in an AI answer, then search for it or call without clicking anything.
Below: what each tool shows, how to set them up, the monthly prompt check we run, a worked example of a monthly AI line, and what can't be measured at all. We work with law firms across the US and Canada, and also in Australia and the UK.
Where it shows up
AI search lands in four different places, and one large part lands nowhere.
Each AI tool reaches your firm by a different route. Knowing which route shows up where is most of the work.
| What happened | Where it shows | What you can see | What you can't |
|---|---|---|---|
| Someone clicks your link in ChatGPT, Gemini, Copilot or a similar assistant | GA4, AI Assistant channel | Visits, landing pages, form fills and other key events | The question they asked |
| Someone clicks your link in an AI Overview or AI Mode | Search Console under "Web", plus the Generative AI performance report; GA4 as Organic Search | Clicks inside regular results; AI impressions in their own report | Which click came from the AI answer |
| Copilot or Bing's AI summaries cite your page | Bing Webmaster Tools, AI Performance | Citations, cited pages, sample grounding queries | Clicks or calls |
| An AI tool names your firm and the person calls or searches your name | Your phone, your brand searches, the intake question | Only what the person tells you, or a rise in brand searches | Anything automatic |
The last row is the big one for law firms. A person asks for a family lawyer in their city, reads three names, and calls the one that sounded right. No referral, no click, no tag. That's why asking every caller matters as much as any report.
Google Analytics
GA4 now separates AI assistants into their own channel.
GA4's default channel group includes an AI Assistant channel for visits from sources like ChatGPT, Gemini, Deepseek, Copilot or Grok. Google says it excludes AI Overviews and AI Mode, which stay in Organic Search.
Open the traffic acquisition report
View it by the session channel group and find the AI Assistant row. Google sets the medium to "ai-assistant" when the referrer matches its list of AI assistants.
Check the sources inside it
Add Session source as a second dimension. If a tool you expect, such as Perplexity, appears under Referral instead, note it and count it with the AI line by hand.
Mark the actions that matter as key events
A form submission, a tap on the phone number, a booked consultation. Without key events, GA4 can count AI visits but not what they did.
Look at landing pages
Which pages AI tools send people to tells you which pages they quote, and which ones deserve the next update.
Compare month to month, never day to day
Volumes are small for most firms. A handful of visits either way in a week means nothing.
If your property uses a custom channel group, check it has an AI line above Referral, or AI visits disappear into referrals. Our measurement plan for our own site puts an AI line above Referral for exactly that reason. Our attribution guide covers how GA4 fits with the CRM.
Google's AI features
AI Overviews and AI Mode are inside your Search Console numbers, not beside them.
Google reports clicks from its AI features in the Performance report under the "Web" search type. There's no filter that splits them out.
A click on a link in an AI Overview counts as a click, and every link in one overview shares a single position. In AI Mode, a follow-up question counts as a new query. Our guide to AI Overviews and AI Mode covers how those appear and what a firm controls.
The workable proxy is searches for your own name. In Search Console, filter queries containing the firm's name and the lead lawyer's name, and track impressions and clicks month over month. It picks up the people who saw your name in an AI answer and came looking, which no referral report can.
Bing and Copilot
Bing's AI Performance report counts citations, which no other tool gives you.
Microsoft launched AI Performance in Bing Webmaster Tools as a public preview on February 10, 2026. It shows how often your pages are cited as sources in Copilot, Bing's AI summaries and select partner integrations.
- Total citations and average cited pages
How often your content appeared as a source in the period, and how many of your pages were cited per day on average. Microsoft says neither number indicates ranking or placement within an answer.
- Grounding queries
The phrases the AI used when it retrieved your content. Microsoft says this is a sample. For a law firm it's the closest thing to seeing the questions behind the citations.
- Page-level citations and trend
Which URLs get cited and how that changes over time. Pages cited for the right questions are the ones worth keeping fresh.
It reports citations, not visits or calls. Treat it as a visibility measure next to GA4's visit counts. Our guide to how Copilot picks law firms covers setting up Bing Webmaster Tools.
The monthly prompt check
Ask the same questions every month, and turn the answers into one number.
No AI tool reports how often it names your firm. So you ask, the way a client would, on a fixed schedule, and score the share of answers that name you.
Write a fixed list of client questions
For our own firm we use 20 per market, written the way a client asks: practice and city, with and without the word "near me", plus a couple that name the firm to check what's said about it.
Run them in clean sessions
ChatGPT with search on and Google AI Mode, each in a private window and signed out, so your own history doesn't shape the answer. Add Perplexity, Gemini and Copilot if your clients use them.
Record the same five things each time
Named or not, position, which other firms were named, which sites the answer cited, and anything wrong it said, copied word for word.
Score it
The share of runs that name your firm. Ten questions in two tools is 20 runs; named in 5 is 25%.
Judge the trend over three months
Answers change between runs and between days. One screenshot proves nothing either way; a three-month line does.
The cited sites column is the useful one for planning: it shows which directories, review sites and pages the tools lean on in your market. Our guide to checking what AI says about your firm has the full prompt patterns and a table to fill in.
Asking callers
The intake question catches the AI leads no report can.
Give AI its own answer on the "how did you hear about us?" question, on every form and every first call. Then follow those leads through to signed or not in the CRM.
- Name it plainly
"ChatGPT or another AI assistant" as a dropdown option. If it isn't on the list, people pick "Google" or "Other", and the AI line stays at zero.
- Ask a follow-up on calls
"Was that a Google search, or did you ask something like ChatGPT?" One extra question at intake, and the answer goes in the CRM in the caller's words.
- Carry it to the outcome
An AI-sourced lead that signs is the number that matters. Count consultations and signed cases for the AI source the same way as every paid channel.
When AI search works, the calls tend to be people who already decided they want you. One family law firm that now shows up first in ChatGPT has added 50 to 100 calls a month over the last three months, is signing a lot of them, and reports that the lead quality is incredible. More on how those clients choose on our family law marketing page.
A worked example
A hypothetical monthly AI line for a two-lawyer estate planning firm.
Invented numbers, to show how the four measurements fit together in one report. Not a client result.
Note the wording: "at least". Every AI number in a law firm report is a floor. Our estate planning marketing page covers how those clients choose a firm.
What can't be measured
Be honest about the gaps, so nobody reads a floor as a ceiling.
Some of AI search's effect will never show up as a tracked visit. The fix is to name the gaps in the report, not to pretend they're filled.
- No AI company reports how often it showed your firm's name. Prompt checks are a sample, not a census.
- Google doesn't split AI Overviews or AI Mode out of Search Console, and GA4 counts their clicks as Organic Search.
- Answers vary by run, by day, and by whether the person is signed in, so any single check can be off.
- People who read your name and call without clicking only show up if intake asks.
What we see in our client work is that AI search usually shows up as "more calls overall" before it shows up as a neat line. A family law firm we worked with pivoted fully into estate planning, and prospective clients started finding it inside ChatGPT and similar tools, not just Google. Our AI search service reports all four measurements each month, labeled as a floor.
Common mistakes
Where firms go wrong.
The AI search measurement mistakes we see when firms first look at this.
Looking for an AI line in Search Console
There isn't one. AI Overviews and AI Mode are inside "Web". Use brand searches as the proxy.
Judging on one screenshot
A single answer in ChatGPT changes by the next day. Score a fixed list of questions monthly and watch three months.
Testing in your own signed-in account
Your own history shapes the answer. Use a private window, signed out.
No AI option on the intake question
Without it, AI leads get recorded as "Google" or "Other", and the channel looks like it does nothing.
Reporting AI visits as the total
Visits are the smallest part of it. Report visits, citations, prompt score and self-reported leads together, as a floor.
Real results
What this looked like for real firms.
Two firms where AI search became a real source of clients: a family law firm adding 50 to 100 calls a month from ChatGPT, and a practice that moved into estate planning and is now found inside AI tools.
Identifying details are anonymized to protect our clients. Individual result, not a promise or prediction of any specific outcome for your firm.
FAQ
Questions lawyers ask us.
Straight answers to the questions that come up most.
Can Google Analytics show traffic from ChatGPT?
Yes, when people click a link. GA4's default channel group has an AI Assistant channel for visits from sources like ChatGPT, Gemini, Deepseek, Copilot and Grok. People who read your name and call without clicking won't appear there.
Can we see AI Overviews traffic separately?
No. Google counts AI Overviews and AI Mode within the "Web" search type in Search Console, and GA4 puts their clicks in Organic Search. Watch searches for your firm's name as the proxy.
How do we know if ChatGPT recommends our firm?
Ask it, on a schedule, the way clients do: a fixed list of questions in a private window with search on, recorded the same way each month. Score the share of answers that name you and watch the three-month trend.
What does Bing's AI Performance report show?
How often your pages are cited as sources in Copilot, Bing's AI summaries and some partner integrations, which pages, and a sample of the phrases the AI used to find them. It's a public preview since February 2026, and it counts citations, not clicks.
How many cases should AI search bring in?
We don't publish a target, because it depends on your practice, city and how established the firm already is. It tends to build over months and show up as more calls overall. Our guide on showing up in ChatGPT covers what moves it.
Does this work for firms in Canada, Australia and the UK?
Yes. GA4, Search Console and Bing Webmaster Tools work the same way in each, and the prompt check just uses local wording, such as "lawyer" or "solicitor" and your own city.
Can you measure this for our firm?
Yes. We set up the channel, the intake question and the monthly prompt check, and report all four measurements together. Schedule a consultation and we'll run a first set of questions for your practice and city.
Where we do this
The services this guide touches.
What this looks like when we run it for a firm, with a demo for your practice on each page.
Sources
Where these facts come from.
Official pages we read when writing this page. Platforms and rules change, so check the current version before you act on any of it. This is marketing guidance, not legal advice.
- Search Console Help, Generative AI performance report (Search)
- Google Analytics Help, Default channel group
- Google Analytics Help, URL builders: Collect campaign data with custom URLs
- Google Search Central, AI features and your website
- Google Search Console Help, Performance report data: AI Overviews and AI Mode
- Bing Webmaster Blog, Introducing AI Performance in Bing Webmaster Tools Public Preview (Feb 10, 2026)
Want a second pair of eyes on this?
Book a free 30-minute call. Tell us how cases come in today, and we'll tell you straight what we'd change, and whether we can help.
