I had a few follow up questions:
Is this profile usually a verbal communication with you and the landlord then or do they expect to see written proof of those profile details during a viewing appointment?
What would an "reasonable" price be for the mock up listing of the 65 square meter place in Friedrichshain-Kreuzberg be then?
Lastly aside from rent I'm guessing the two biggest overheads are power and internet? What could one expect those to be?
Or have a German ID card (Personalausweiß). Last time I tried to rent there (2017) I had a hard time finding a place as most landlords insisted that I'd be showing them my ID card (mine expired while living abroad). I think without it, it'll be additional hassle with the Einwohnermeldeamt for you and the landlord (not sure about that, but some landlords wont be either).
Things like whether you have dogs, kids, are a smoker.
Or other things that you're not supposed to discriminate by according to law (looks "foreign", doesn't speak German or with a strong accent).
And then the non-obvious things like your financials (what is the likelihood of paying rent or lack thereof) or connections.
But I think the article doesn't specify actually what they mean by profile.