First-click attribution is a marketing measurement model that gives 100% of the credit for a conversion to the first interaction a customer had with your brand. It helps you understand which channel or campaign introduced someone to your business — even if they clicked on other ads, emails, or blog posts before finally converting.
This model is useful for evaluating top-of-funnel efforts like brand awareness campaigns, content discovery, or social media ads — activities that might not drive immediate sales but play a key role in kicking off the buyer journey.
Example:
Imagine someone clicks on a LinkedIn ad for your webinar. A week later, they read a blog post, then return via a Google search to book a demo. With first-click attribution, the LinkedIn ad gets full credit for bringing that lead into your funnel — because it was their very first touchpoint with your brand.