Before the automobile, many people had to walk or bike to a place (which always tired them out) and had to live within walking or biking distance of their work or school. When cars came along people could see relative who lived far, live away from towns if they wanted, and go all over the country.
As for the radio this invention allowed people to hear stories that were all around the town, listen to sports games, and even hear stories from across the globe. Hopes this helps!