The March on Washington was the the eventuality of several other failed attempts to arrange marches to the same effect, but this time the marchers now had much more support from many more people and organizations.
The March went down during august 1963 in the capital of the united states; Washington.
The march gave a model for social change in america, and inspired americans fighting for rights for any group. It really saved the civil rights movement, and created a ton of momentum for the movement. And also made racism significantly less of a “cool thing” for many people.
A comparison can be made between this march and the march for science that happened recently, it was working to promote scientific advancement when politicians are often encouraged, often monetarily, to avoid it. Especially with climate change which people often deny despite it being fact, similar to how many whites denied blacks to be equal despite the fact we are all just human beings.