Aresult of the freedom summer campaign was that

I believe the answer is: the number of African American voters in Mississippi increased significantly.

Freedom summer campaign was initiated to invite as many African American as possible to use their rights to vote and choose for the representattive that planned for legislations that would benfit them. At the beginning of campaign, the number of african americans that voted in Missisipi was 5.4% , by the end of the campaign, they become more than 60%/