Amazon's video ads chief is focusing on growing TV ad share and prioritizing ad performance.
Competition for streaming ads is increasing as rivals like Netflix and YouTube expand their live sports and TV viewership.
Amazon touts its reach of 115 million monthly ad-supported viewers on Prime Video and is rolling out a new ad buying and planning tool called Complete TV.
Advertisers have raised concerns about limitations with Amazon's ad-buying tech and want more data on show placements.