What is the main idea of "Everyday Use," and what are some symbols that reflect that main idea?

The main idea is that you honor your heritage not through hanging representations of it on the wall, but through living with it, and through giving it "Everyday Use," as the title indicates.
The seats in the home represent this, as does the butter churn, but the biggest symbol is the quilt, which Wanjiro wants to hang on the wall but which her mother gives to Maggie to use.