The Notes area in the Title Details contains valuable information about the record and area of your search.
In this example the notes gives information about the divisions for Hackney parish.
It states the following: A film or fiche set may contain more than one parish. Hackney parish is divided into the sub-districts of Stamford Hill, West Hackney, Hackney, and South Hackney. Upper Clapton, Dalston, Kingsland, De Beauvoir Town, Homerton, Lower Clapton, and Hackney Wick are localities in Hackney parish. IN Census returns 1841 ... [et al.] / Great Britain. Census Office.
Lets go back to the Film Notes tab button at the top right hand corner of the screen.