@dragestil@hostux.social yes, it's a really simple and clever thing, it's described here: https://joinmastodon.org/verification

Of course it only shows that one thing is connected to another, still both could be scams. But it does increase trust, in my case it at least proves that whoever controls this account also controls the eliasrudberg.se domain. (which costs money so at least people can trust that this account is not auto-created by a bot that spews out millions of such accounts)