CTV Attribution: How Law Firms Trace Signed Cases

In the streaming-leading market we track, 48% of all legal ad spend, $6.2M of a $12.9M market, now runs through streaming across 151 firms, and every dollar of it is attributable down to the firm because a CTV impression resolves to a household, not a cookie. That single fact is why CTV attribution works when display attribution is falling apart. You’re not chasing a browser that clears its cookies and hides behind an ad blocker. You’re connecting a known household to what it does next.

Most law firms think TV can’t be measured. That was true for broadcast. It is not true for streaming.

Why Cookies Were Never the Right Tool

Cookie-based attribution was built for a click. Someone sees a banner, clicks it, lands on your site, and a cookie follows them to the form. That chain breaks in three places now: browsers block third-party cookies by default, ad blockers strip the trackers, and nobody clicks a television screen anyway.

CTV sidesteps all of it. The impression is tied to a household through IP and device graphs, the same household-level targeting that lets you reach specific zip codes. Attribution then asks a different question than display does. Not “who clicked,” but “what did the exposed households do that the unexposed ones didn’t.”

The Exposure to Branded-Search to Signed-Case Path

Here’s the path every CTV campaign for a law firm actually runs on. It has three steps, and each one is measurable.

The signal you measure is lift. Compare branded-search volume and direct traffic among exposed households against a holdout of unexposed ones. The gap is the channel working. Pair it with call tracking tagged to campaign geography and you have a line from streaming spend to intake, no cookie anywhere in the chain.

What You Actually Measure

You don’t get a click trail. You get something better for an awareness channel: a set of lift signals that move together when the channel is working.

Branded search is the cleanest signal. It’s hard to fake and almost always means the name came from somewhere. When a market shifts to streaming and a firm’s branded queries climb in the exact zip codes it targeted, that’s attribution doing its job. Direct traffic behaves the same way. Both rise among exposed households and stay flat in the holdout.

The Proprietary Anchor: Spend We Can Already Attribute Firm by Firm

Attribution isn’t theoretical for the markets we track. We resolve streaming spend to the firm, which is the same resolution that makes outcome attribution possible.

In that one market, $6.2M of a $12.9M monthly spend runs through streaming, and we can name which of 151 firms spent it. One firm allocates 81.3% of its budget to streaming while several rivals spending over $300,000 a month sit at 0%. That firm-by-firm resolution is the foundation. If you can attribute spend to a household and a firm, you can attribute the household’s next action to the spend.

Compare that to a market still stuck at 3% streaming, and the attribution gap is the competitive gap. The firms that moved to streaming can prove what it did. The firms still on broadcast are buying impressions they cannot trace.

Why Last-Click Will Lie to You

If you judge CTV by last-click, you’ll kill a channel that’s working. Here’s the trap.

CTV creates the demand that search captures. A household sees your spot, then searches your name, then clicks a search ad, then converts. Last-click hands every dollar of that credit to search. The CTV impression that started the chain gets nothing. Multiply that across a campaign and you’ll conclude streaming doesn’t work, right before you cut the only channel building your name. Measure lift instead, and the time CTV takes to work shows up as rising branded demand, not a same-day click.

Setting Up Attribution Before You Spend

Get the measurement scaffolding in place before the first impression runs, or you’ll have no baseline to compare against.

Tag every campaign to its geography. Stand up call tracking with numbers mapped to your targeted zip codes. Baseline your branded-search volume and direct traffic now, so the lift is visible later. Hold out a portion of comparable households as a control. None of this requires a cookie, and all of it survives the privacy changes breaking display.

This is also where the cost of CTV earns its premium. You pay a higher CPM than broadcast, but you can prove what the spend did. Broadcast can’t show you a single attributable household.

CTV is the rare TV channel you can actually measure. Trace the household, not the cookie.

References

1. Nielsen. "The Gauge: Streaming Captures 47.5% of Total TV Usage." December 2025.
2. IAB. "2025 Digital Video Advertising Spend Report." 2025.
3. MNTN Research. "Increased Investment in CTV Leads to Better Performance." 2023.
4. Taqtics Market Intelligence. "Atlanta Legal Advertising Channel Mix, 151 Tracked Firms." December 2025.
5. Taqtics Market Intelligence. "Legal Advertising Streaming Adoption by Market." December 2025.