And why does it matter? Tomorrow, I’m being interviewed by Karen Senteio, host of the Stiletto Dialogues podcast. Her first question to me is “What is the definition of influence and why does it matter?” The definition of influence: “the capacity to have an effect on the character, development, or behavior of someone or something” “To impact or effect on something or someone.” This past year I’ve taken women to a private salon at Chanel in Paris.