Answer:
It dealt a blow to segregation in public facilities.
Step-by-step explanation:
During the time when Brown v. Board of Educations taken place, American government adopted Segregation policies for the usage of its public infrastructures. (The Black citizens were not allowed to use the infrastructures used by White citizens. This include things such as public transportation, schools, toilet, etc)
In the end, the judges Brown v. Board of Educations decided that Segregation in public school was unconstitutional and it should be abolished. This decisions was very controversial at that time, and various of movements started to rise and call for the end of segregation as a whole.