Well, not really...
He surely meant https://twitter.com/@zeratulsteemit, which is his Twitter page.
When you are writing user names (for example @xplosive) on Steemit, the website is automatically creating a link to the Steemit profile with the mentioned name.
Just the same as Twitter.
So the website is intercepted that name as a Steemit profile.
But on Steemit, he is using the @zeartul username and not the @zeratulsteemit.
The @zeratulsteemit account is currently not exist on Steemit at the moment.
That is why it leads nowhere...