These are a variety of records from the Brandenburgisches Landeshauptarchiv (Brandenburg Main State Archive) including censuses, lists of families, and registers of Jewish birth, marriage, and death certificates. Some synagogue records may be included.
As with many of FamilySearch's browsable collections, one may select subsets of the collection to browse. Sometimes these subsets may mitigate the drudgery of sorting through unindexed records. All the subsets, with the exception of the last one, in this collection are titled "Unterlagen uber Juden" (Jewish Records) and indicate of inclusive years. The last set's title identifies a variety of vital records in its content.
For more information on this record set, see the FamilySearch Wiki page.
* The only previous specifically Jewish record set digitized on FamilySearch.org is the Austria, Vienna, Jewish Registers of Births, Marriages, and Deaths, 1784-1911.