Household vs population of block group

Hi All,

I'm glad to have found this group. I have been looking all around but can't find the answer to this - I have several ACS 2017 five year estimates datasets where there is an estimate total field (HD01_VD01).  Is this an estimate of the number of households or the population in the block group? 

In particular, I'm looking at tables B17010; B03002; B01101; B22010; B25044 and B09002.

Thank you.