Sunday 21st March was census day in England, Wales and Northern Ireland.
The survey provides a glimpse of life, which can be used by organisations to help make sure they provide the right services for people.
The 2021 census in particular, will help us understand how coronavirus has affected everything from our health to our finances.
Things to talk about at home:
Can you find out who has completed the census in your household? What kind of questions did they need to answer?
Challenge: Can you remember the last time you (or your family) completed a form for something else, it
could be to join a club or to order something? What questions were asked?