The answer to this is in the column header right on the census page :) There are various instructions in the column headers as well as at the very bottom of the census pages.

Text:
RESIDENCE, APRIL 1, 1935
IN WHAT PLACE DID THIS PERSON LIVE ON APRIL 1, 1935?
For a person who, on April 1, 1935, was living in the same house as at present, enter in Col. 17 "Same house," and for one living in a different house but in the same city or town, enter, "Same place," leaving Cols. 18, 19, and 20 blank, in both instances.
For a person who lived in a different place, enter city or town, county, and State as directed in the Instructions. (Enter actual place of residence, which may differ from mail address.)