Census records can be incredibly informative sources regarding our ancestors. Don't just look at the information about your family member but look at others on the entry too. Often you'll be surprised what you find. An example is that of John Gettings. On his marriage certificate, Eliza Annie Holland was a witness and it was hard to determine if she was a relative. The 1881 census shows that Eliza and her husband were actually neighbours of John, so we can assume they were all friends and not related.