First-Click Attribution

Every attribution model needs the same three inputs: a recorded journey of touchpoints for one person, a conversion event and a lookback window that says how far back to look. First-click then applies one rule.

1. Take every touchpoint recorded for the person inside the attribution window.
2. Find the earliest one. That is the first click, or the first touch if impressions and organic visits are recorded too.
3. Give it 100% of the conversion, and every later touchpoint 0%.
4. Sum those credits per channel, campaign or ad, which is the report you read.

The rule is simple, which is its main strength. Nobody argues about a weighting, and the answer is the same in every tool that has the same journey data. The weakness is in the phrase 'recorded touchpoints', and we come back to it below.

Take a B2B service business with a €12,000 average deal. One lead's journey to the closed deal has four recorded touches over three weeks.

• Day 1: Meta ad clickDownloads a guide from a Meta lead campaign. The first recorded touch. Credit: €12,000.
• Day 8: Google Search adClicks a generic search ad on a category keyword and reads the pricing page. Credit: €0.
• Day 15: newsletter clickOpens the nurture email and clicks through to a case study. Credit: €0.
• Day 22: brand search ad, form fillSearches the company name, clicks the brand ad and books a demo. The deal closes five weeks later. Credit: €0.

Under first-click, the Meta campaign's report shows €12,000 of revenue against its spend and the brand search campaign shows none. Flip to last-click and the same deal moves entirely to brand search. Nothing about the customer changed, only the rule.

• Budgeting awareness channels

  Prospecting on Meta, LinkedIn, YouTube or display rarely closes anything directly. First-click is the model that shows whether those euros start journeys that end in deals.

• Judging content and organic

  Blog posts, podcasts and organic social are almost always the opener, never the closer. Under last-click they look worthless; under first-click they get measured.

• Long sales cycles

  When a deal takes three months and eight touches, 'which channel found this customer' is a real budget question, and first-click is built to answer it.

In each case the model answers one question, next to another model that answers a different one. Used alone, it has the same blind spot as every single-touch model, pointed the other way.

• The first click you can see is rarely the first clickA journey is only as long as your storage. Safari caps JavaScript-set cookies at seven days, people switch from phone to laptop, and anyone who first visited eight months ago is a new visitor to most tags. The 'first' touch is really the first touch inside your window, on this device.
• It rewards volume over intentA cheap click that happens to come first collects the whole deal, whether or not it did anything. Channels that generate lots of low-intent first visits look better than they are.
• It gives the closer nothingRetargeting, brand search, comparison pages and sales follow-up all read as zero. Cut them on that evidence and conversion rates fall, which the model then blames on the openers.
• The platforms no longer offer itGoogle removed first-click, linear, time-decay and position-based from Google Ads and GA4 in 2023, leaving data-driven and last-click. Meta credits the last ad interaction inside its attribution setting. To read a first-click view of paid media, you need your own journey data.

First-click sits at one end of a short spectrum. Last-click is the other end. Linear spreads credit evenly, position-based gives the first and last touch 40% each, and time-decay tilts toward the finish. The overview of how they differ, on the same example, is under attribution model.

For a lead generation business the useful pairing is first-click next to last-click, on the same table of closed deals. Where a channel scores on both it is doing two jobs; where it scores on one, you know which. Multi-touch attribution then fills in the middle, and marketing attribution software is what keeps the journeys long enough for any of these models to be worth reading.

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First-click attribution answers 'what started this journey' and nothing else. That is a valuable question for anyone spending on awareness or content, and a dangerous one to act on alone, because it says the closer did nothing. Read it next to a last-click view of the same deals, and make sure the journeys behind it are recorded for longer than a browser cookie lasts.