What is first-click attribution?
First-click attribution gives all the credit for a sale to the first touchpoint in a customer's path. Here is how it works, a worked example, when it helps, and why Google Ads and GA4 no longer offer it.
First-click attribution is a marketing attribution model that gives 100% of the credit for a conversion to the first touchpoint a customer interacted with, usually the first ad click. Every later touch, from retargeting to a brand search, gets nothing. It answers one question: which channels introduce new buyers to your brand?
How does first-click attribution work?
The model looks back through the conversion path, inside the attribution window, and finds the earliest recorded interaction. That touchpoint receives the full conversion value. If the window is 30 days and the real first touch happened 45 days ago, the model credits whatever came next.
| Touchpoint | Position | Credit |
|---|---|---|
| First interaction | 1 | 100% |
| Every later interaction | 2 to n | 0% |
First-click attribution example
An illustrative shopper in Riyadh places a SAR 900 order after four touches:
- Day 1: clicks a TikTok ad.
- Day 6: clicks a non-brand Google search ad.
- Day 10: clicks a link in your email.
- Day 12: searches your brand name, clicks a brand ad and buys.
First click gives TikTok the full SAR 900. Last click would give all of it to brand search. Same sale, opposite conclusions about which channel to fund.
When is first-click attribution useful?
Use it to judge prospecting: which channels and campaigns bring in people who later buy. It always undervalues retargeting, email and brand search. Watch for three limits:
- Google dropped it: Google's 2023 announcement removed first click from Google Ads and GA4, and the GA4 attribution guide says it is "no longer available as of November 2023."
- Lost first touches: declined cookies, cleared browsers and device switches mean the first touch you see may not be the true first.
- One platform's view: an ad platform only sees its own ads, so its "first" touch is not first across your marketing.
Related terms
Compare it with last-click attribution, position-based attribution and other multi-touch attribution models.
How Grower helps
Grower's attribution engine de-duplicates conversions from every connected channel and app into one count, then credits each touchpoint with the model you pick: last click, first click, linear, time decay, position-based (40/20/40) or custom weights.
Frequently asked questions
What is the difference between first-click and last-click attribution?
First click gives all the credit to the first touchpoint in the path, and last click gives it all to the final touch before the conversion. First click favors channels that create demand, such as social and video prospecting. Last click favors channels that capture it, such as brand search, retargeting and email. Neither shows the whole journey.
Can I use first-click attribution in Google Ads or GA4?
No. Google retired first click, linear, time decay and position-based models in Google Ads and GA4 during 2023. Google Ads now offers data-driven and last click, and GA4 offers data-driven, paid and organic last click, and Google paid channels last click. To see first-click results, use a cross-channel tool that applies the model to your own conversions.
Is first-touch attribution the same as first-click attribution?
Mostly. First click strictly means the first ad click, while first touch can include any first interaction your system records, such as an organic visit, an email click or a webinar sign-up. Check which interactions each tool counts before you compare their first-touch reports, or the "first" touch may not be the same event.
Want first-click results next to every other model on one de-duplicated count? Book a Grower demo, or read marketing attribution models explained to see one sale split every way.