All Creative Commons licenses allow creators to maintain their copyright while allowing others to use their work. The Licenses also ensure that the authors get credit for their work.
There are different levels of Creative Commons Licenses, most notably, some that allow commercial use and some that do not.
There is also the Creative Commons Zero (CC0) License, in which the owner of the work forfeits all rights, including attribution. All works with a CC0 license are considered public domain.