Rosa Parks kicked off what would come to be known as the Civil Rights Era. The organization and network that was put together in order to make the bus strike a success was crucial to the formation of the picket lines ans organized sit ins at segregated lunch counters where they would not seat/serve people of color. Laws were changed,lunch counters were opened, buses were de segregated. The press they got brought the story nation and even world wide. Bringing attention to the struggles in the south to the middle class white families in the North via television was critical to the struggle. As was the enlistment of Northern white college students to the protests. When those same families saw the dogs being set on those white young men and women, they demanded change all over the country. Also the murders of those same students during the "Freedom Rides" where blacks sat in the white sections of segregated buses only to be arrested and beaten. America had enough and the Civil Rights Bill was passed eliminating the color lines permanently. No longer would there be a white and a colored water fountain or restroom but the same rights for everybody. Enforcing the law however proved difficult in some of the small towns in the south where the local police was used to doing things the old way. Slowly those people were forced to move aside for civil rights and it has gotten better ever since.
That is a quick hack explanation of the civil rights struggle Rosa Parks started.