Cloud computing allows users to store and access their data over the internet rather than on a local computer. It involves storing data on remote servers that can be accessed from anywhere with an internet connection. Some key benefits of cloud computing include being able to access files from any device, automatic backup of data, and not needing to worry about storage space on individual computers. Popular examples of cloud computing platforms are Google Drive, Dropbox, and Flickr, which allow users to store and share documents, photos, and other files online.