When you upload a photo to Facebook, you still own the copyright to that photo. This means that you have the exclusive right to reproduce, distribute, and display the photo. Uploading a photo to Facebook does not transfer the copyright to Facebook. However, by uploading the photo, you grant Facebook a nonexclusive, transferable, sublicensable, royalty-free, worldwide license to use the photo. This means that Facebook can use the photo in any way it sees fit, without having to pay you or ask for your permission. The license is also transferable, which means that Facebook can transfer the license to another entity, and sublicensable, which means that Facebook can sublicense the license to another entity without your permission. It is important to note that Facebook does not own the copyright to the photo, but it does have the right to use the photo in accordance with the license you have granted it.