What is "small talk"used for

What is "small talk"used for what is the small bag used( )? what is the small bag used( what is it used for What is it used for? Small talk is very useful.What is small talk?It means that t What is a pen used for? What is a computer used for?意思 Small talk is very useful in our daily life.What is small ta what are appropriate topics for 'small talk',and what are in Here is a small talk. what is it used for改宾语从句