We can use the word more to describe something we like better. We can also use the word more to describe a larger amount.
I like to eat broccoli more than carrots.
There are more hands than phones.
This winter had more snow than last winter.
We can use the word less to describe something we do not like as much.
We can also use the word less to describe a smaller amount.
She likes pens less than pencils.
I like fruits less than ice cream.
There is less rain today than yesterday.