Why was Novel called a novel of manners?

i think novel is free and was written for all the stage of people i mean all those who knew and also know reading or can,t and also give many lesson and give more knowledge and make youre mind more wealthy...

A novel of manner is a novel in which the main conflict and most of the plot is concerned with culture, manners, customs and laws.

Anything by Jane Austin is a novel of manners.