I Googled it:
What is a podcast?
"Today, podcasts are an extremely popular form of audio entertainment and have progressed beyond being downloadable radio shows. Each podcast is a series created by a host and then published episode-by-episode online, where subscribers can then download and listen to each episode when it's released."
What is the point of having a podcast?
"People might listen to a podcast to learn more about a topic, keep up with current events, or because they want to laugh. A podcast can also be a powerful marketing tool. Podcasting can be an opportunity to promote your business, broaden your reach, or market to your existing audience."
Why would anyone listen to a podcast?
"Podcast listeners most often turn to podcasts for entertainment, education and diversion. About nine-in-ten podcast listeners say learning (88%) and entertainment (87%) are reasons they listen to podcasts, including more than half who say these are major reasons they tune in (55% and 60%, respectively)."
Who mostly listens to podcasts?
"50% of monthly U.S. podcast listeners are aged between 12-34, 43% between 35 and 54 years old, and 22% are aged over 55."
Not sure it's for me.