About 17 percent of Americans 12 or older, about 46 million people, listened to a podcast in the past month, up from 12 percent in 2013.
The medium is taking off now because of the happy convergence of three big trends. The technology has finally improved enough that listening to podcasts is easy and convenient for ordinary listeners. Talented professionals — many of them veterans of NPR or other radio outlets — have begun to focus on the medium. And a new generation of podcast-focused businesses are figuring out how to convert these professionally produced, popular podcasts into serious money.
Read more at Vox.