Last click or data-driven attribution in Google Ads: which one, and what happened to the others?
Short answer
Only two models remain: last click and data-driven. Data-driven learns only from the conversions it receives, so what you upload matters more than which you choose.
Google Ads now offers two models. Its help page lists last click, which gives all credit to the last-clicked ad and keyword, and data-driven, which distributes credit based on your past data for that conversion action and is the default for most actions.
First click, linear, time decay and position-based are no longer supported, and conversion actions that used them were moved to data-driven. The page gives no removal date.
So the choice is mostly about volume and about what you want to see. Last click is simple and predictable. Data-driven can find value in earlier touches, but it needs enough conversion data and you cannot see inside it.
The thing that matters more than the model is what Google is told. Data-driven attribution can only learn from the conversions it receives. If your best sales, the ones that close later in a CRM, never arrive, it optimises for the ones that do, usually the cheap form fills.
So before you debate models, check what is being uploaded: the click ID, hashed customer details, and the later stages, within the upload window. Google accepts a click ID import within 90 days and 63 days for enhanced conversions for leads.
Which model are your main conversion actions on?
DataCops in short
For this question: DataCops keeps the click on your own domain for up to 90 days, matches the sale, sends it once to Meta, Google Ads, TikTok and LinkedIn with a delivery log, and sends CRM stages like booked, won and paid. It is not a reporting dashboard. Every visit also gets a bot verdict against 360+ billion IPs, with a Real people only switch per ad platform (off by default).
DataCops is a tool that does the ad-conversion job without a container, warehouse or plugin: one script and one DNS record on your own domain, a bot verdict on every visit with a Real people only switch per ad platform, the real sale from your CRM or Shopify sent back to your ads, new campaigns warmed up with the customers you already have, and a log of every send.
How DataCops does it
- First-party collection, no extra tool. One script and one DNS record put collection on your own subdomain; with DNS on Cloudflare, the free Worker reads the click at the edge before the page loads. A signed server-set cookie lasts up to 400 days where enabled.
- Real people only. Every visit gets a bot verdict, with a Real people only switch per ad platform, off by default. Every form email is checked for disposable providers, domains with no mail server and an email risk score.
- Every ad platform. Conversions go server-side to Meta, Google Ads, TikTok and LinkedIn, counted once against the pixel by event ID.
- The sale after the form. HighLevel natively, any CRM by webhook, Shopify through the DataCops Shopify app.
- A log you can read. A delivery log row per conversion, with the reason when it did not go. A TCF 2.2 consent banner and first-party analytics (a GA4 alternative) come from the same script.
Best for: teams who want better ad conversions without building or maintaining the pipe: lead gen, ecommerce, clinics, home services, B2B and agencies.
Ads Warmup: tell the ads who pays
Ads Warmup, DataCops' flagship feature, sends customers you already have to Meta, Google Ads and TikTok before a new campaign spends: upload a CSV (only email is required, up to 20,000 rows), see a 0 to 10 match score per person, pick the event, and send. Rows are dated when you send, and Google Ads credits only people who clicked a Google ad. Preview is free; sending needs a paid plan. Check your own consent basis for the list first. See Ads Warmup.
Ways to do this job
| Option | Best for |
|---|---|
| DataCops | One script, a bot verdict, CRM sales and a delivery log |
| Hosted server GTM (such as Stape) | A team that already owns a GTM container |
| The platform's own pixel | Basic browser tracking on one platform |
| Self-hosted server GTM | Engineering teams who want full control |
When not to use DataCops
- You need custom tag logic or non-ad destinations. DataCops sends to ad platforms and is not a Google Tag Manager container.
- You want a reporting dashboard. DataCops fixes what goes into your ads. It does not replace the reports you already read.
Sources and further reading
More on this: Google Ads attribution in 2026, and the complete guide to offline conversion tracking.
Check the model in the conversion action settings, then check what is being sent to it.