Walmart is making a bigger push into television advertising as the retail giant looks to capture more value from the massive amount of consumer data generated through its stores, website, app and entertainment businesses. The move reflects a broader transformation in advertising, where retailers are no longer simply places where consumers buy products. They are increasingly becoming powerful media companies capable of selling advertisers access to highly targeted audiences. Walmart’s growing ambitions in TV advertising are part of this larger retail-media trend. Traditional television advertising has historically depended heavily on broad audience measurements.