Okay, let’s talk about something that trips up almost every marketer I know — attribution models. If you’ve ever stared at your analytics dashboard wondering why Google Ads gets all the credit while your blog posts and email campaigns look like they did nothing, this one’s for you.
Here’s the thing nobody tells you upfront: there’s no single “correct” way to measure which marketing channel actually gets you a sale. It depends entirely on which attribution model you’re using — and different models will tell you completely different stories about the same customer journey. So let’s break down the four models that matter most: first-touch, last-touch, linear, and time-decay attribution.
First-Touch Attribution: Who Started the Conversation?
First-touch is exactly what it sounds like. Whatever channel brought a person to your brand for the very first time gets 100% of the credit for the eventual sale — even if that happened eight months before they actually bought anything.
I like this model when I’m trying to figure out what’s working at the top of the funnel. If you’re spending money on content marketing, SEO, or paid social to build awareness, first-touch attribution tells you which of those efforts is actually pulling people in. The catch? It completely ignores whatever it was that sealed the deal later. A blog post that introduced someone to your brand gets all the glory, even though the retargeting ad or the follow-up email might be what actually closed the sale.
Last-Touch Attribution: Who Closed the Deal?
This is the model most tools default to, and honestly, it’s the easiest to set up. Whatever the customer interacted with right before converting gets full credit. Clicked a retargeting ad and bought the product ten minutes later? That ad gets 100% of the credit.
Last-touch makes a lot of sense for short buying cycles — think simple online purchases where someone sees an ad, clicks, and buys within minutes. But if your customers take weeks or months to decide, this model can be seriously misleading. It makes your bottom-of-funnel channels (retargeting, branded search) look like superstars while completely writing off the awareness-building work that got the customer there in the first place.
Linear Attribution: Everybody Gets a Trophy
Linear attribution takes a more democratic approach — every single touchpoint in the customer’s journey gets equal credit. Five interactions before the sale? Each one gets 20%.
This is a good middle-ground model if you genuinely believe every touchpoint played a real role and you don’t want to arbitrarily favour the first or last interaction. It’s especially useful as a sanity check alongside a more specific model. The downside is that it treats a passing glance at a display ad the same as someone actively requesting a demo — which, let’s be honest, isn’t really fair either.
Time-Decay Attribution: Recency Matters
Time-decay attribution sits between last-touch and linear. It gives more credit to touchpoints that happened closer to the actual conversion, and progressively less credit to older ones. So an email a customer opened three days before buying gets more weight than an ad they saw three months earlier.
This model works really well for longer, more considered purchases — B2B sales, high-ticket items, anything with a genuine decision-making phase. It respects the idea that as someone gets closer to buying, their more recent interactions probably matter more, without completely dismissing what started the journey.
So Which One Should You Use?
Honestly? Most marketing teams I know don’t stick to just one. They’ll use last-touch for quick day-to-day decisions — like deciding whether to pause an underperforming ad — and lean on linear or time-decay for bigger-picture budget planning. If your ad platform and your analytics tool are disagreeing with each other, that’s usually a sign you need a proper multi-touch attribution setup rather than trying to force one model to explain everything.
A Few Digital Marketing Blogs Worth Following
People often ask me where I keep up with this stuff, so here are a few that consistently put out solid, practical content rather than fluff:
- HubSpot Blog – great for beginner-to-intermediate breakdowns of inbound marketing and attribution basics
- Search Engine Land – if SEO and paid search are your focus, this is where the real updates land first
- Moz Blog – excellent for anyone who wants the “why” behind SEO decisions, not just the “what”
- Content Marketing Institute – solid if you’re building out a content strategy and want data-backed advice
- Neil Patel’s blog – heavy on actionable, no-nonsense tactics you can apply the same day
A word of caution though — a lot of “marketing blogs” these days are just AI-generated content stitched together to rank on Google. They read fine on the surface but rarely say anything useful once you dig in. Stick to sources that show real case studies, actual numbers, and writers with a name and a face attached — that’s usually a good filter.
At the end of the day, attribution isn’t about finding the “perfect” model. It’s about picking the one that answers the question you’re actually trying to answer — and being honest with yourself about what it can’t tell you.