Question

what are list? How are they useful

Answer 1

List is a thing which is made and it's a useful thing as it helps us to remember things like for ex if we make a list of the products we need to buy in a shop and then it's easier for us to remember which things we have to buy.

Answer 2

List are something where the subjects are written. Subjects can be anything like name, things, etc.
It is helpful as it helps us to remember this subjects.

Hope it will help you!