Audio and video formats are becoming more actionable in the digital advertising space thanks to a pair of familiar technologies: display ads and QR codes. For instance, rather than relying on affiliate codes to promote discounts in podcast advertisements, brands can now use Spotify’s clickable CTA Cards as a more seamless way for consumers to access those promotions. Read how these tried-and-true technologies are eliminating friction along the customer journey, according to a piece in AdExchanger.