As mentioned last week, there are several types of creative commons licenses that are available:
This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.
This license lets others remix, tweak, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms. This license is often compared to “copyleft” free and open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use. This is the license used by Wikipedia, and is recommended for materials that would benefit from incorporating content from Wikipedia and similarly licensed projects.
This license is the most restrictive of our six main licenses, only allowing others to download your works and share them with others as long as they credit you, but they can’t change them in any way or use them commercially.
There is also the license “all rights granted” or CC0. This CC0 tool allows licensors to waive all rights and place a work in the public domain.
Without a doubt, creative commons licenses provide us with the tools we need to make possible a world of shared culture.
--Jan Nicklaus S. Bunag, Entry No. 11