Are you aware of the benefits and differences between evergreen and standard advertising? Standard advertising is when you pay for an ad and it disappears once you stop paying for it. This is common in billboards, magazines, and advertising on Google & Facebook.
Evergreen content is a piece of content that continues to see new traffic even years after it is released. This is why podcasts are a great place to advertise your brand/business since new listeners discover the show months and even years down the road. This equates to more leads for you long after your sponsorship finishes!