For years, marketing industry observers have stressed that last-click attribution—which credits a purchase to the last ad clicked by a customer—doesn’t provide a complete picture of who to credit with a sale. But many marketers still rely on last-click because it’s what they’re accustomed to, and they’re unsure what the payoff will be if they switch to a more thorough attribution model. Priest Willis, senior global marketing manager at Lenovo, spoke with eMarketer’s Ross Benes about how Lenovo is moving beyond last-click attribution.