u/Rev_Bottoms

Hey guys, my wife and I have a podcast we do together, and we are just starting out (releasing our 12th episode tomorrow). I am an avid podcast listener, and often I will hear ads for other shows play before the podcast I'm listening to. I'm assuming these shows are paying for their show trailer to be promoted. But my question is how. Is there a site where I can pay to have them advertise my show this way across multiple platforms? We post on YouTube and Spotify, then use an RSS feed from Spotify to the major platforms after that. Would love some advice here.