One of your top priorities for your podcast is to increase your audience size. There is a better way to use Facebook ads and organic posts. Send them to your podcast website.
Your podcast name and episode titles are the biggest factors in helping listeners find your podcast. Not so with search in podcast apps.
Big changes are coming to Google Podcasts involving podcast search and discovery. Podcasts are going to become extremely searchable. Google will be taking podcast search even deeper, based on what’s said IN your podcast.