Money can be used in various ways to make the world a better place. Giving money to charities or research teams allows them to improve and expand their work. Besides funding the work of non-profits, altruists can have an impact by funding high-impact for-profits or through less common funding models.
There are a wide variety of issues which help determine the best ways to use money to have impact. These include questions about when to give, how far to publicize giving, how best to cooperate with other funders, and how much to diversify donations.