Creative Commons helps you legally share your knowledge and creativity to build a more equitable, accessible, and innovative world. We unlock the full potential of the internet to drive a new era of development, growth and productivity. (https://creativecommons.org/about/ )
There are six different types of Creative Commons Licenses and each allows different uses. Usage allowances vary from redistribution and sharing; editing and adding; commercial usage; etc. The Creative Commons site provides detailed information about each of these licenses and what they allow at: https://creativecommons.org/licenses/ .