The links go directly to the full terms of each license.
Attribution: CC-BY: lets others distribute, remix, adapt your work, as long as they credit you
Attribution-ShareAlike: CC-BY-SA: lets others distribute, adapt, remix your work as long as they credit you, and they use the same license
Attribution-NonCommercial: CC-BY-NC: lets others remix and adapt your work, they must credit you, and they can’t use it commercially
Attribution-NonCommercial-ShareAlike: CC-BY-NC-SA lets others remix and adapt your work, they must credit you, they can’t use commercially, and they must use the same license
Attribution-NoDerivs: CC-BY-ND: lets others reuse, but not change your work, and they must credit you
Attribution-NonCommercial-NoDerivs: CC-BY-NC-ND: lets others use your work, they must credit you, they can’t change it, and can’t use it commercially
Explanatory images of Creative Commons Licenses are available at How To Attribute Creative Commons Photos by Foter (Wikimedia)