Your housing.

Note: The law lists as one of the requirements that the applicant “has sufficient living space for themselves and the family members living with them in a common household” (§ 9 Abs. 2 Satz 1 Nr. 9 AufenthG); the standard is described in § 2 Abs. 4 AufenthG. Here we only record your details — whether the living space is sufficient is assessed solely by your immigration authority.