Creative Commons some restrictions apply
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Could be any of the below options.

Allows redistribution,  modify, remix, tweak, and build upon the work, even commercially, as long as you credit photographer for the original image.

Allows redistribution, commercial and non-commercial, as long as it is passed along unchanged and in whole, with credit to photographer.

Allows redistribution,  modify, remix, tweak, and build upon the work non-commercially, and although the new works must also acknowledge the the photographer and be non-commercial, they don’t have to license their derivative works on the same terms.

Allows redistribution,  modify, tweak, and build upon, as long as they credit you, is for non commercial use and the identical terms.  All new work based on yours will carry the same license, so any derivatives will also be non-commercial in nature.

Attribution Non-commercial No Derivatives (by-nc-nd)

Allowing redistribution, as long as you mention photographer and link back. You can't change the image in any way or use it commercially.

Attribution Share Alike (by-sa)

Allows redistribution,  modify, remix, tweak, and build upon the work even for commercial reasons, as long as you credit you and license your new creations under the identical terms. All new works based on yours will carry the same license, so any derivatives will also allow commercial use.