Philanthropy is doing something for the public good to improve other people's lives. A person who does that is called a philanthropist. Philanthropy often involves donating money for things that need to be done.
Today philanthropy is used for public good, focusing on quality of life. People owning big business donates their salary to charities such as Bill Gates, Mark Zuckerberg, Lee Miglin, Chuck Feeney, Mr Beast and Ted Turner.