This is what will be used for your podcast's main listing on the various platforms.
My Recommendation: One concise paragraph explaining who you are, what the show will be about, who it's for, and what they'll get out of it.
Try to keep it evergreen by not mentioning a specific format or release day and organically include as many applicable keywords as possible.
The objective is to entice the reader to listen.
Please keep in mind that most platforms will lump all of the text together into one paragraph (which is one reason why shorter is better) and don't allow for hyperlinks (clickable links).