The IAB expects podcast advertising to exceed $500 million in 2019, which represents growth of about 65% in just two years. For podcasters looking to attract advertisers, demonstrating proof of performance isn’t just a nice-to-have—it’s quickly becoming a need-to-have… Based on data from nearly 50 custom studies Nielsen has conducted over the last 18 months, podcast advertising has demonstrated that it can move the needle on many important metrics for advertisers. Notably, podcast advertising has been found to increase key metrics like awareness, ad recall, affinity, recommendation and purchase intent.