AdWords generates revenue both directly and by assisting other traffic sources in conversions. Looking more closely, AdWords is especially effective as an assist for non-brand traffic, where it contributes to over 1 million conversions through assistance. By developing a custom attribution model that weighs assisted conversions more heavily and adjusting AdWords bids accordingly, the company saw a 22% increase in the value of assisted conversions over 5 months. The key learnings are to understand how each channel contributes throughout the user journey, create an attribution model tailored to your needs, and use attribution insights to optimize bidding strategies.