Every account has a profile page, which you can customise to include a profile image, banner image, text description, links to your websites (including verified links) etc. More info at:
I think that feature is pretty much abandoned. You can still recommend accounts, but people are unlikely to see them. It would be better to recommend accounts in a pinned post.
(The official recommended accounts feature was never very visible in the first place, it required people to be viewing a profile while logged out or viewing the original page if they're on another server...)