Meanings of become a pitchman in английском

Although initially reluctant to become a pitchman, Wilson changed his tune after two decades of memorably goofy commercials.

I lived with my grandparents. When he became a pitchman, his father gave him just one advantage: he extended his son credit.

He went on to other shows and became a pitchman for Jell-O pudding while also stirring controversy with critical comments about black youth culture.