Important Quote HELP!

Maycomb was an old town, but it was a tired old town when I first knew it. In rainy weather the streets turned to red slop . . . [s]omehow it was hotter then . . . bony mules hitched to Hoover carts flicked flies in the sweltering shade of the live oaks on the square. Men’s stiff collars wilted by nine in the morning. Ladies bathed before noon, after their three-o’clock naps, and by nightfall were like soft teacakes with frostings of sweat and sweet talcum. . . . There was no hurry, for there was nowhere to go, nothing to buy and no money to buy it with, nothing to see outside the boundaries of Maycomb County. But it was a time of vague optimism for some of the people: Maycomb County had recently been told that it had nothing to fear but fear itself.

Please explain why this quote is important and how Scout uses this in Chapter 1.