Ida B. Wells is best known for her work as a muckraking journalist. She exposed abuses of African Americans and fought against those abuses. Her career as a journalist was the major result of the court case you mention.
Wells sued the railroad for forcibly ejecting her from a train car that it said was for whites only. This was before Plessy v. Ferguson had declared segregation of this sort to be legal. Wells initially won her lawsuit but then had it reversed on appeal. Because many people wanted to hear her story, she became a journalist.