According to the Creative Commons website, “Creative Commons is a nonprofit organization that enables the sharing and use of creativity and knowledge through free legal tools.
Creative Commons licenses are not an alternative to copyright. They work alongside copyright and enable you to modify your copyright terms to best suit your needs.”
Under Creative Commons licensing, the owner of the work retains the copyright, but licenses certain rights to the work under 6 types of licensing.
The least restrictive license allows use of the work for any purpose with the only requirement being attribution to the copyright owner. The more restrictive licenses may not allow commercial use and/or derivative works and/or require that the finished work be released under the same terms as the Creative Commons licensed media used in the work.
It is very important that you familiarize yourself with the types of licenses and their requirements if you plan on using any Creative Commons licensed media.