Photo sharing allows digital photographs to be shared online through websites and applications that facilitate uploading and displaying images. Popular photo sharing sites like Flickr allow users to upload, organize, tag, and geotag photos into albums and sets. These sites offer tools for photo sharing, such as slideshows with music, photoblogging, and mobile photo sharing. Most sites provide privacy controls and copyright licenses to share photos safely and legally. Photo sharing can also be used for educational purposes like storing and promoting school events.