This is a link service. So you can create a custom link and choose what links are then displayed on that page. For podcasting this is useful because people often use different apps to listen. So you can share a single link that includes all the different podcast players one might use. You could also link your website and socials on the same page.
I tested out the free version and this is the maximum that you can create (image below). So you can manually insert links, give them a name, select an avatar and a basic color scheme but that’s it. This might be everything you need. If you want the pro version it’s a relatively inexpensive monthly fee. ($6/month)
Note: During my research I found that apparently linktree was originally created for instagram to avoid their hyperlink ban. I saw a lot of posts and videos saying not to use it for instagram.